I like the concept. The controls are a little slow to react. The game could use some particles like when you die or land on the ground. I like seeing viking stuff laid around in a ‘futuristic’ environment. In the second (moving platforms) stage you can land at the very edge of the platform and then you can’t jump again.
I think with some fixes it could be a better game, quite a relaxing game (but stressful at the same time). The music is also good and subtle.