The idea is pretty good. the problem is the execution.
the collisions are too big, sometimes i bareley touch an acid puddle and i get killed instantly. also, they get in the way of bullets so its almost imposible to have fans because you need to have them one step from you, but they are faster than you so they catch you and they killed you instantly. What i do like is the movement, its really satisfying in my opinion, but everything gets in its way. I'll recomend you playtest games, that way you can catch many of this errors easily. Maybe this came off as too rude but that wasn't my intention jajja, you kinda new and of course you are not gonna make everything perfect.
Yes, its true. thats why in game jams you have to do game that takes you half the lengh of the jam to make so that you can test it, iterate and bugfix. I also make that mistake and scoped a game that would take me 3 days. The problem is that you aren't going to make the game straigh away going straight to your idea like a behemoth, you will find flaws in design, and you will go back and forth with some things. Thats why i didn't completed my mission for my gam