This had a tiny bit of potential, but it's completely unplayable.
The camera hides everything that's behind you when you turn around, jumps stop in mid-air with no explanation or indication, enemies spawn anytime anywhere INCLUDING ON YOU, "E" apparently does nothing (unless I missed something; was it supposed to be the unconventional weapon?), and there is nothing telling you where the exit of level 2 is.

The main mechanic is not innovative or fun enough to make up for these problems. I don't think there's much left to salvage. :[

Controls do not work at all. Liked the idea but quickly gave up because of the controls.

The idea is solid, but the single most important aspect in platformers is movement precision. For your next platformer, I suggest you focus on that - spend as many hours as it takes to make movement - jumping and moving around - as clean and intuitive as possible. In this particular game, the poor movement unfortunately completely undermines the thing that makes this platformer unique - being able to shape terrain.

The idea is good, but sadly it lacks in execution.

Controls definitely need some working on (there were times where it felt like I was jumping into an invisible wall) but the concept itself (creating platforms) does have some potential.

I like the premise of adding blocks. It would be cool if you could pick up the blocks and throw them or somehow control them. Ah I got an idea. Move the character with WASD. Add blocks and move them with the mouse. Maybe you only have one or two blocks at a time.

I like the idea of shaping the world to get to the objective a lot! Needed some more polishing though, camera and controls were not great (especially: friction shouldn't halt movement instantly midair), and I think there was no finish line at level 3.