Interesting variation on the old tank genre. I think the most pressing changes are the view area - I'd rather see what's coming up that what's behind; the tank graphics - it took me a while at the start to orient myself because it's not obvious which end is the front; and actually advancing levels when you kill all the tanks in the current level.
Having more than one collectable on screen at a time is something I haven't seen before, but the placement could be improved (don't place bacon directly on the player or another piece of bacon, and don't place it off-screen - this must have happened once, because it went down to only 2 pieces on screen).
Why in the tutorial is the medium gear labelled "You can buy a small gear by clicking this button"? Also, it doesn't ever seem to get difficult, and so is boring.
I've hit an interesting bug whereby stopping level 14 at a certain point left the kettle in a different starting point. I'm now trying to work out whether that makes it easier to complete.
 "Neon Maze"){kind=icon}
 "Diamond Detonation"){kind=icon}
 "Lazer Tank"){kind=icon}
 "SubHunter"){kind=icon}
 "Exploit"){kind=icon}
 "Cogitate – A Game of Gravity"){kind=icon}
 "Monkey Metric"){kind=icon}
 "ZedRay"){kind=icon}
 "Penguinz"){kind=icon}
 "Quest for Bacon"){kind=icon}
 "Particles"){kind=icon}
 "Don't Look Back"){kind=icon}
 "Gears"){kind=icon}
 "Bathysphere"){kind=icon}
 "Leftie"){kind=icon}
 "Mouse vs. Elephant"){kind=icon}
 "Electric Box"){kind=icon}
 "Air Hockey"){kind=icon}