Really good but...
You still have a few bugs to work out. My biggest grievance in that regard is Bowser version2 in the lava world. When you throw him farther then one of the bombs, he starts a permanent loop of flying in a circle, forcing you to commit mariocide in order to try again. This was especially annoying, as it blew away all 14 of my lives, and in general wasted my time. The rest of the game is amazing, but you just need to get rid of the final few bugs like that. Thanks!