It's Bust-A-Move.
Okay, a few quick tips before you play this game...
...1: turn the music OFF! Normally, this music would really drag this game down, but the artist had the foresight to allow the player to turn it off.
2: Go to the "tips" section after you start a game, but before you start firing. The "tips" section actually explains what those weird dowhackeys are.
This is probably the best puzzle game on the frontpage this week. Apparently, it's a pretty slow week for puzzle games on the frontpage. It couldn't really hold my attention for very long, but if you like Bust-A-Move, then by all means, have at it.