1st problem is the fact you have no way to check your lives or which level your on or even if you are close to the end.
2nd problem is that the levels are way too long, with nothing keeping you motivated at all (I'm not saving a princess or beating bowser) the game gets kind of plain, which would be fine... If the levels didn't take 10 minutes each!
The game isn't too bad though, the controls aren't too bad though, it's pretty self explanatory though and you don't need a tutorial idiots! It is more simple that an original Mario game, obviously the arrows are to move, a to jump and b to shoot. I'd say the game makes barely makes par.