Woo, this was pretty fun. The pills are HARD to get large quantities of, and once they pop up near the pipes it feels like they're impossible to reach (maybe not have such a constant stream of foes? how about short random pauses?), but it's a fun idea, and the layout reminds me of the old Super Mario Bros games where you just jumped around on turtle shells, it's a kicked nostalgia that way. Nice graphics, nice music, nice game!
Btw, also wish there was some form of killcount. That 2000 pests killed medal felt like it took forever. :P