To all who are asking how to do invert and tick tack, play "The Car Park" and it illustrates all the moves at the bottom of the screen in the beginning.
I unlocked all the riders... hmm all the races are done. There should be at least one character specific level for every character.
It would also be nice to be able to create your own character, maybe after you've unlocked everything.
You know what's annoying? It says "Click to send this and all waves above now"... emphasis on NOW. Anybody else hundreds of waves into endurance and getting really annoyed how long it is taking for the waves to come?
It would be cool if after a certain level (maybe 20+ or something) if the gems stopped shooting individual projectiles and instead shot a continuous beam that did partial damage to monsters between the gem and the target.