I really love the juice in the main menu! The gameplay/upgrade system is really addicting.
In the full release I'd definitely have a full controls tutorial instead of just "esc to see controls", but hey, it's a demo.
I think I have a bug to report? I was playing on level 2 and I was shooting while on a broken piece of planet then the game got really slow and I could not move.
I look forward to buying the full release!
Screenshot if it helps?