Clever interpretation of the jam theme here! I did have a problem with the controls, although it says to use numpad for movement you can still use the arrow keys, but if you do you can only aim your weapon forward, it's likely to cause some confusion.

Other than that, it looks and plays well, but my main problem is that the pacing is too slow. For the first few levels, the enemies travel along a single axis and all you need to do is pick out the ones that are black. It would be nice to have additional mechanics that force the player to move around, for example, rather than stay in one spot and shoot.