Not seeing some of the complaints.
A lot of the problems that are occuring seem to be from user error. I thought the controls were altogether flawless (never did a moment occur as I played that I blamed the controls for my downfall). The challenge factor was excellent. I played through it without getting so angry I felt like giving up, but not so easy that it was boring and just felt like I was going through the motions.
However, you also added the 'Time Trial' factor would curbs up difficulty exponentially. I don't have the attention span or desire to attempt to tackle those times, but I'm sure the challenge is certainly there.
Music was catchy, never grated on my nerves or detracted from the game experience, so that was a plus.
All in all, an excellent platformer that was very fun and challenging. Keep up the great work.