There is a exploit or something i dunno, but if you keep on clicking the next wave button the timer stays at one. which lets you regen your base. I don't know if this is a glitch or not, just wanting to put it out there
little girl:mommy there's a guy shooting a high powered sniper rifle at the ground and throwing flash grenades.
mom: don't worry he's the zombin... what what?
we should be able to *bookmark* bubbles. because its annoying when theres a really strong enemy and you can't kill it. then you go away to make your tank stronger, only to realize you forgot the bubble the enemy was in. plz consider this request