A bit disappointing. I loved the core mechanics, but the levels are all the same and it quickly becomes a grind just to get he achievements. Only three different monsters, and three different tile types makes a very generic game. There is so much potential in the mechanics but not much delivered. The "bosses" are all the same and usually easier than the levels themselves.
This game was great fun until I unlocked the car which just ruined the game for me. Totally brakes the progressive gameplay build up. Not fun at all so I lowered my rating.
Great game, I am impressed.
Some ideas for the sequel
* More visual difference between ammo and credits boxes.
* Story
* Set it on a space ship instead of some weird green lake room???
* Secondary objectives on missions, which will give you bonus
* I want to see the ammo in the unit statues in the top corner
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 "Battalion Commander"){kind=icon}
 "Puzzle Defense"){kind=icon}
 "XenoSquad"){kind=icon}
 "Faultline"){kind=icon}
 "Kingdom Rush"){kind=icon}