I think there's a good concept here, but no matter how many times I tried, I died instantly right after clicking the start button. Your game over message is clear enough as to why you lose, so you can try again, that's good. Giving the players a second or two to assess the situation and prepare themselves will help a lot. Things move really fast, it could be slower at the beginning, then faster and faster until the player loses. It should not become hard too fast or people will give up real quick. 

For a first game, I think it's cool, with some tweaks the fun is not too far 🙂