So. This was a good game, don't get me wrong. I did enjoy it. However, the game gets really tedious by level 3, and starts to get really repetitive. There really should be something to break up the monotony a little. I even tried the cheats, but that didn't help either. It is charming at certain points, but overall, the game needs something more to be good. First off, the lack of a jump really hurts the game, and honestly, I'd prefer to be able to use a controller for this game (but I know not every game will be able to have that functionality). The art could use some improvement, but overall, I did like the old animations styles of yours so I can let it slide. Good games don't always have to look the best.
Overall, it's a great effort, and an interesting game, but it does get old a little too quickly. Games like Streets of Rage still had some replayability despite being repetitive, but thsi game seems to lack something that makes it replayable.