It's a fun concept, building up trees from nothing as the tower defense strategy. The collection of the candy canes is a little difficult due to the jump and movement controls. If the jump were set to a height where the apex is just at the range of overlap with the candy canes, the player could keep momentum and bounce from platform to platform with ease, keeping them in flow. I think that the candy cane spawn rate is fine, but the enemy spawn rate could be reduced a bit, or a break period given for the player to build up their trees. The pressure was constant, so a moment of refuge might be nice to have between waves.
Overall, good game!