Music is very well done. From the visual perspective, the game is a bit rough around the edges but I'd say still has a pretty unique style so the quality of certain things is not that noticeable.
Some parts of the game are a bit unpolished. Jumping feels unresponsive (ie. certain tricks like coyote time would be a nice addition) and it feels a bit frustrating to place something then immediately get a fail state because you got stuck.
It's definitely an interesting concept though, I like how things scale along with you when you hold them and you can use things you placed in a previous run to finish a level (the concept of having to die sometimes to reset to starting size is interesting).