Something is buggy with the main menu, you cant see your cursor or click on anything. I had to alt tab and place my cursor on the play button in order to able to click it.
I tried a lot but the double jump is very hard. I succeeded a few times to double jump but the timing is too exact, you should consider making the timing a bit more forgiving.
My only problem with the game is that you can run off the screen and then you still lose when the avalanche gets to the bottom of the screen although you are far off the screen.
Cool game, but jumping felt a bit buggy, sometimes you jump a lot and sometimes barely. I guessed that the jump amount was based on the time it was held but would have loved to see a gauge.