Protip: If you can buff up the bomb tower with enough +speed banners, it becomes an EXTREMELY overpowered machine gun and shoots like 10 bombs per second. You need to get the fire rate buff to at least -24. After that, GG. This is probably a bug.
This game has taught me that happiness is the only objective in life, love is the only way to get happiness, life stops at 50, and that bouncing skulls can suddenly kill your partner. That's pretty depressing.