Not a bad start.

The controls need a little tweaking. Like climbing up ropes. You should make the detection a little wider. It's kind of anoying when your running along and try to climb up a rope, and he jumps of the edge and dies instead :? . It's a little hard, when your running from the opponent, to stop, try and line up the rope to your skinny body, and then climb.

And although it's not really posible, but every game does it, is to allow air control, when you can change direction in air, while you jump. Makes it a little more user freindly.

Apart from the need of a graphic artist, it's quite fun .