So I'm currently designing/creating a game for project purposes , I'm still in a slump about the mechanics of the game, the game type will be a 2.5d side-scrolling platform game, Should I Limit the things that the player can do? like I'm planning to add a skill tree , but I think that's not really needed to the genre of the game I'm building, the game will have 5 levels, and the game should be finish in about 9-10 months from now. Any tips is greatly appreciated thanks!