very nice idea. I think there are a few problems with it tho. The best strategy for building levels is to first box in the enemies with stone , then build a way with the remaining stone and platforms and thats it really. this leads to very slow and save gameplay. especially because there are always a lot more materials there than needed which makes it very easy and lets the game feel very samey all the time. The fact that there are a few more levels than necessary does not help. The last level is the best one because you actually need to prioritize speed over safety what makes it so much more interesting. In my opinion there could have been a lot more levels like that one.
Another criticism is that the platforms are not really that useful. there is no reason for them to be on way because it is never needed in the level design. That fact and that there are just too much of them makes them feel a lot less valuably when constructing levels.
The art is nice. Not amazing but really well done for 7 days. And the music fits well and gives it a very chill vibe.
But despite my criticisms I enjoyed this one a lot and I wouldn't have written such a long comment if I didn't care.
Keep it up