This game is delightful! I was glad to see you guys go with the "a la mode" theme, I thought of maybe going that route at first too but couldn't think of a great idea like an ice cream truck serving up hostile crowds, that's brilliant.
The graphics, sound, and gameplay mesh together perfectly. I would love to see more games in this graphical style. I think this entire game would work amazingly as a mode inside a wacky Sims or GTA style game, as a career path/way to earn extra cash.
I didn't notice that the ice cream cone on the truck rotated like a turret until I had already been playing for awhile, that was one of the moments of discovery that made this game delightful in addition to the lederhosen guys and jumping onto roofs. Awesome work!