Pretty good, but not perfect.
The platforming style is nice, and the game was pretty solidly made. Three complaints.
1. Enemies suicide-rush you and just drain your health like crazy. It's waaaaay too easy to get gang-raped by a bunch of enemies.
2. Aggro is seriously fucked. Sometimes, I could get right next to someone before they attacked, and other times I was getting blasted from off-screen. Please decide where the aggro distance is and keep it there. Preferably on-screen.
3. Dying. Dying is the single most aggravating aspect of the game. Every time you die, you have to click through two screens (which is a real bitch for laptop-users like myself) talking about a high-score (which I haven't cared about since I stopped going to arcades) and then go through the map again. This is ridiculous, especially since you die so often.
Otherwise, a solid game.