I'm quite disappointed in this one. Spamming a is about all you need to do, and press left or right every so often. No upgrades, same baddies each wave is fairly boring. I also don't like the attack system, in that if you hit a small guy 4-5 times, and uppercut a big guy, the big guy will die and the little ones are invulnerable, and the same if you do it in reverse (tested on level one, when I ran out of other targets I uppercut the air instead, they didn't die and managed to kill me instead. I hit the little things a good 400 times.) I also didn't really like the lack of any form of regen, even if it was as low as 1hp/1Sp every 2 rounds.
As a guy who seems to have one helluva knack for making awesome games that make hours fly, this one barely earns a 5/10 in my books. Music and graphics were good, but this (and Rufus Da demon) are the only two games that are... lacking.