2D Platformer - A work in progress

For the past few weeks, I've been working on a 2D platformer. So far, I've done the coding for the player, the enemies, and some of the collectibles. In this project, since it is a Mario game, I want to add some unique gimmick of some sort where I make the bros. work together or maybe have a cooperative special ability. I haven't fully decided yet. This might even open or inspire an idea for me to come back to it later in the future and make it co-op. By 2 or 3 more weeks, I should have this project nearly or completely finished.