Quite Bad
The controls are very unresponsive. Another reviewer remarked that your man can't do more than one thing at once. Not only that, but there seems to be a quarter-second pause between each action you do take! Very annoying.
Also, the scanline effect was a strange choice considering the graphics, while rough, were not low-res. Not sure what you were going for, there.
For those having trouble with the game, here are some tips:
1) Most levels start with some beasties coming up behind you. Try to avoid moving ahead until you've dispatched them.
2) Move forward in baby steps--scroll as little of the screen as possible. This way, you tend to get the bowling balls independently of enemies, making each easier to deal with. Watch the right edge of the screen as you babystep for archer arrows. You'll get a couple of free steps before he sees you and fires, letting you ambush him without retaliation.
3) Reload after every wave of enemies. Occasionally, you can't help but fight several enemies at once, so you need to be prepared with full ammo.
4) Reload before exiting each level. You don't get a free reload between levels, and most levels start with an ambush.