Excellent game, but needs a freeplay mode.
The game is very well done. The upgrade prices are well balanced, and the level tier up in difficulty fairly evenly. The last few missions force you to think more critically, but are still beatable. The only improvements to the game that I would recommend are: - A multiplayer mode, with up to 4 players - An endless freeplay mode - More possible upgrades (for example, building temporary walls, another extra bounce or two, and the ability to shrink the players tank size)