Very nice Paper Mario ish asthetic, 2.5ds are usually 2d games in 3d models, i think prince of persia sands of time on PSP, this one is paper sprites on 3d background (I guess 2.5 d could go both ways)
The animations are really smooth and look really good, I think it is a much better decision than 3d everything in this case.
I felt the holes in the levels to be annoying, maybe spike damage would be a better fit, the hole doesnt feel like a good challenge to me.
The precise shooting is a design choice but in top down view without projectile and direction it kind of feels odd or that my bullets are not going at the right place, something like spawning a spike would be a better logical fit than bullets for eg.
These are just minor nitpicks, I think your game is pretty cool and some adjustments would go a long way.
Congrats on making a cool and beautiful game in 7 days