I don't think I've ever actually had a game run that bad before on DSi. I think the main gameplay is really fun like any tower defense game! But holy shit you cannot play this game comfortably after ~round 70. The frames just drop into the single digits, so it's impossible to place your units after a wave has started. You just kinda have to hope nothing bad happens in the meantime. It definitely would've been better if I'd played it on a different platform because I still think that at its core bloons is always some good fun.