It’s fun, but very difficult… I couldn’t get past level 3 without using the Konami code. I think there should be a way to speed up the timer or go back to the main menu so that you don’t have to wait until two 20-second timers end to play the individual levels if you do choose to use the Konami code (or just mess up a level such that there’s not enough time left to realistically finish it).
Also, I’m not sure if L-6 B-side is possible; I always seem to hit the spikes at the beginning when jumping over the pillar.
I really liked the art though, and the platforming/movement mechanics feel very smooth and polished! Well done!