Despite some complains, an alright game.
I loved the original Bubble Tanks game, and was rather disappointed with BTA. The game feels agonizingly slow to progress through, and while the customization and creation aspect that has been introduced is a lot of fun to mess around with, the core game is far too easy.
Now I only played up to level 10 before getting tired of it, but I was sad to see no bosses at all, and the difficulty curve moved far too slowly. Each level would introduce one new enemy type, and each arena would feature a couple more enemies than the last. The problem is the arena was far too large for the amount of enemies and their attacks, and even when hit the amount of health is so large that it barely matters.
For suggestions, I'd suggest completely removing enemy types that have no attacks. For a tutorial level or health recharge arena inbetween big fights they're fine, but they're in ever single arena and they do nothing but waste your time with clean up efforts to move on. A difficulty setting that would do something as simple as increase enemy bullet damage would be nice to make things feel harder, and something should be done sooner to decrease how easy it is to just circle strafe around the arenas over and over again to beat any swarms. The game feels like it should be a more intimidating bullet hell styled shooter, and perhaps with some bosses this might have been remedied some.
Enough negative though. I did play it for a while, and though I had a good deal of issues with the game, there was nothing particularly bad about it. It's slow to power up, and it's easy but the addition of a level creator was neat, and full control over my tank was a cool addition too. All in all I could see there was a lot of effort put into this game, and it shows.