Really neat job!
Art is simple like the classic marios however very stylized and decent throughout creating a very polished complete look to game. The menus were great as well.
I got to play a lot of games so only had time to complete level 1 took me awhile but was challenging and fun. The different enemies and powers are very cool.
This was top notch and as other commenters have mentioned you deserve more ratings.
Well done this was a great effort and a very fun cutesy nostalgic game you made.