Due to complaints of balancing issues two characters in the game have been patched.

Frank
Complaint: Under-powered due to lack of damage and not enough speed to compensate.
Solution: Frank's passive (Mach 3) has been buffed, increasing his running speed to 200% instead of 150%. Franks passive also increases his attack speed to 150% instead of 125%. An after-image effect has been added to help indicate when this takes effect.

Mario
Complaint: Over-powered due to his low-attack ("Where's the QB?") making him nearly invulnerable.
Solution: Hitbox on Mario's body has been increased slightly and the hitbox on his charge-flame has been shortened, allowing strikes from above and below to be more effective.

In addition, a chime has been added to the special gauge to help indicate when it has been filled.
(If you already downloaded the game, you may have to reinstall it to apply these changes)
Thanks to those who brought this to my attention, and please continue to let me know about any recurring issues.