We can see your inspirations, but it's efficient and very well done! (small bug in the level 1-5, that I had to finish 2 times to validate it). The level design is excellent and the design too! very well done, until the screen indicating that we need a GBC when we launch it on DMG! However, even though I finished the 5 levels, I can't access the next one, did I miss something ?
Cheers, I'll have to check out that bug you mentioned. Uploading an updated version with bug fixes is locked until the voting period of the jam is finished but I will be spending some time bug fixing and polishing the difficulty in order to release a final version (that isnt rushed!) in a couple of weeks.
I found the problem with that bug. The two coins on the right side of that level have the wrong variables attached to them. This also causes issues with trying to get all 17 stars. Thanks for letting me know!
For anyone that happens to experience this bug, if you get the one in the top left corner last, then that solves the issue. I'll fix this in the coming update. 
