That's a shame
I love bubble tanks, but this game has some serious flaws. Number 1 you must switch the priority to the one closest to the goal, too many times has this cost me a match that I was well ahead in. Number 2 (more subjectively) it is actually better to kill the spawner slower to kill more of the baddies that spawn....kinda lame. One thing, on ID 36, thanks for not telling the player that the last basic would be about 100 strong, really cool after playing for 25 min with still 10 lives left.
For everyone else here is a general strategy to beat hard levels: Sniper towers, tons of em, then slow em down and either use some splash or area burst to clean up the splitters.