The death animation didn't work one of the times that my character got hit while dashing.
For the second set of gears, the spacing between the first and second gear causes them to sometimes be impossible jump over due to the platform placement and the dash not being activated yet. That can be avoided by slowing down right beforehand, but it does still mean that your tutorial section can become unfair for reasons that are neither the player's fault nor consistent with the rest of the game. Other than that, the only issue I see is with the difficulty in figuring out what new types of gears will do in time to dodge them. Overall the game seems to work well.