Game Idea for the Trip (TL;DR - Too Long ; Didn't Read)

Game Title: Dem Pigs!
Genre: Tower Defence, Action
No. of Players: 1 - 4 players co-op play
Platform: Most probably will be on smartphones/tablets, mainly Android OS or IOS
Internet connect is required to play the game.
Free-to-play, In-App Purchases (Most probably)

Winning conditions: Your castle survives all the waves of angry pigs.

Brief Concept (TL;DR): You and up to 3 other players will be playing as wizards trying to defend the castle from angry attacking pigs. Dig minerals from the nearby mine to build automated towers and cast spells together to aid you!






Map

The map and overall look of the game will be something like this. There will be a castle in the middle of the area surrounded by a forest. There will be a mine somewhere around the bottom right of the map. The thingys around the empty spaces are just grass, don't get bothered by it. Wizards(Players) can only walk, place turrets, and cast spells within the area between the forest, as the angry pigs will spawn from the forest.

TL;DR: Defend the castle, dig the mine for resources, boundary will be the trees.





Gameplay

Defending of the castle in the middle while eliminating the angry pigs will be the main aim of the game. When the castle gets destroyed by the attacking pigs, the game is over. Angry Pigs will spawn at the forested area at all sides of the level, and will walk towards the castle. Wizards(Players) are able to build automated towers to defend against these angry pigs. Each tower has a set stat and firing range. Players are able to farm minerals in the cave to build more towers, upgrade present towers and cast spells. 2 towers are shown in this sketch, the tower on the right is a cannon tower which will shoot cannon shells on nearby angry pigs, while the shock tower on the bottom center will deal damage over time within its area of effect to the angry pigs.

TL;DR: Angry pigs spawn from trees to attack castle. Gain minerals from the cave, use minerals to build towers / cast spells. Defend the castle.






User Interface

This is the user interface(UI). Wizards can move while you tap on them, and drag your finger across the map. The line connected to the sun looking thingy is showing that Player 1's wizard is moving. They will shoot magic bolts to the direction where you tap your finger on the screen. The command button is used to ask another player for help, either to defend or to cast spells, the usage of a command is used on the area at the left side of the castle. You can collect minerals by moving your wizard over the cave and constantly tapping on the cave.

UI will include: Player name, Time per wave, Wave no., Personal minerals collected, pause button, Minerals of other plays, Command pings button, Upgrade button, Experience bar, Spells/Towers button.

TL;DR: Move by tap and drag, shoot by clicking on the screen. Ask for help / build towers / cast spells from the buttons.



QTYMA (Questions That You Might Ask, something like FAQ)

1. So each wave is calculated by the amount of time left? 

Yes, this is to prevent each game from lasting too long, as it is a mobile game. Each game will probably last  for about 5-10 minutes.

2. What is that circle thingy beside Player 2's wizard?

That is just a spell used by the team. What does it do? It could be anything at the moment haha!

3. Why do you need to display details of the teams minerals?

This is if the player wants to do something like build a tower / cast a spell, on a certain part of the map but do not have enough minerals, he/she can use the command button to ask another wizard to assist him/her.

4. What is the command button for?

Proceed to question 3. It will be explained there.

5. Upgrade and XP(experience) bar?

Everytime your wizard's magic bolt/tower hits an angry pig, you will gain experience. Once your xp bar is fully filled, you will receive a upgrade point that you can upgrade stuff like your wizard's movement speed, casting speed, mining speed, using the upgrade button.

6. Spells button?

That button is for your wizard to prepare a spell or build a tower on the map.






Features

I can just TL;DR this.

TL;DR: Towers are upgradable, more powerful spells are casted with wizards positioning themselves at specified areas of the spell circle.






How did I come out with this?
1. 3 themes were available for everyone to select- Defence, Eco City, Teamwork. I combined Defence and 2. Teamwork. Eco City maybe? Its surrounded with trees and all LOL, just kidding :P
3. I wanted to do a game for mobile (smartphones)
4. Smartphone games are usually played while people are waiting for something outside (trains, buses, food to come, etc) so it should be last too long.
5. Singleplayer games get boring really quickly, too repetitive and stuff like that (to me at least).
6. RPG genre games are fun (to me at least, again), but some people just can't find the time to spend too long on RPG games due to its gameplay (grinding, farming, etc).
7. I wanna make a game where its based on a players skill, instead of how much time/money a player spends in a game.
8. I like fast paced games.
9. Why not make an RPG game that fits to the selected themes?
10. *Snaps* comes out with idea.

This game fits into the theme of defence as it is a tower defence game.
This game fits into the theme of teamwork as although you can play this game solo, teamwork actions like assisting teammates in building towers or casting 2 or more wizard spells will make the game drastically easier on the higher leveled waves.
The regular game mode will last for 5 minutes.






Marketing
The game can earn profits from adding unlockable customizable features such as the look of towers, character cosmetics etc. But players should be able to slowly unlock these features via spending in game currency.