Yet another Mario game.
A lot of the elements of the Super Mario games have been done quite nicely. A few complaints come to mind as I'm rooting out the rest of your secrets: the yoshi egg should generate a good item instead of a regular turtle shell or a regular coin; it's virtually impossible to run through the last desert level without getting hurt; Luigi is like doing 2 + 2 compaired to Waluigi who is more like (2^4)^7=.3+(B*5)/2 (I luv math =P); the bricks in the Princess's Castle don't break if they aren't hidden coin blocks otherwise, which is a minor inconsistency. The game engine for physics could use a little work, since at some points I've fallen through a 1x1 block for what seemed like no good reason, although granted I could drop straight down and land perfectly all the time.
Just for the sake of fairness to other players (as it definitely isn't in any mario game I've played so far), there's a platform that materializes at the right end of the castle when Mario attacks with bob-ombs.