Good job :) The visual side of the ODD is very cute.
However, as I already mentioned, the level is rather short. Just a little bit more should be enough.
For the visual side - again, readability is the main focus here, so while I appreciate the care for visuals, don't do it at the cost of readability. Fonts should be simple, clear. Same goes for the building blocks of the game, especially at the bottom they almost blend into the background.
I like how you have color coded everything, however its rather hard to see. Don't be afraid to color it completely. It took me a while to notice that the pit of spikes is instant death. Same for the other outlines, they are very faint and with everything else going on very easy to miss.