I mean, there's not much to say here. While it has some cool ideas, the game itself is really un engaging. The level design is nonexistent, the sandbox mode is barebones and you can't really build anything with the placement options. That being said, it feels like it has good and snappy controls! The jumping feels really good.
I think for the purpose of the jam, you should have really focused on the platformer element. Sandbox wasn't good and ultimately should have just been cut in favor of really capitalizing on your good fun platformer controls.