Woah dude. Did you do it all yourself? All the pixelart too?
Impressive stuff!
The personalized selection screens, beginning sequence, all those backgrounds and animations. I really like the flashing warning signs and arrows. The art is really nice!
Some constructive criticism: On the map with the houses and giant T roboter, maybe mark the platforms one can jump on better. I know you added some extra contrast, but try to make them brighter or something, so they stick out more!