I immediately liked many elements of the game - gaining speed down slopes to launch yourself up the next one, the dash, slip slopping around as the slime... but the bumpers, might just be skill issue, but I had no idea how to reliably make use of them. Maybe there's a particular way you had in mind for them to be used? Throwing them down randomly definitely wasn't it.
The bassy sonic-boom type sound that triggered based on your speed was a nice touch :) Good game!