So... Just for fun, i deciced to try out the Bloonsday device on the iPad. I can't figure out how to activate it! I see thread that describe holding down the mouse on the PC version, but how does it work in a touch interface? I've seen a description of a cooldown period, but I don't see a timer anywhere either. I'm 25 rounds in, and so far it's been completely (as in, never once activated) useless. Any suggestions?