I played the 'super' version, and i think its great. The only problem is that i was learning what stuff did while playing the ga- oh, it already ended...
What i am trying to say is that a tutorial whould be usefull, or some tutorial levels, because the way it works now is also really cool! Only what the point of the game was and what does special walls are, and what the weird tube does... I dont know
So explaining the game would be nice ;)
And my second point is that it isnt hard, i have played the entire game in 2 phases:
1. make a shell of everthing i get
2. Spam the z button.
Gameplay wise its not very interesting, but the graphics and idea of the game kept me entertained. And i had a fun time! So you did well on that part!
The graphics and the retro looks are also really cool!
I understand that this is a game jam game. But these are the points I would improve if you will develop that further.
Good luck!