Quite surprised this hasn't been mentioned before (or I suck at using search), but I would find Blitz a lot more fun if there was a way to make the next round come earlier than the preset timer, like the "send next level" feature you have in a lot of tower defense games. At the moment lower levels of Blitz are too simple and it takes ages for them to end - being able to spawn the first 10 levels together would be far more exciting
Yes but then that would allow people to just jump 10 rounds at a time, boosting a lot of XP and cash, with the proper strategies and all. Maybe just a single wave, not multiple. Also, with a small amount to pay and semi-long recharge.
