Hey - played it on a GB and I was a lot better at timing the double jumps!! Got a lot further.
Would be good to see a progress bar or similar to know you had collected enough fuses maybe? Wasn't sure on what constituted winning, other than frantically jumping for fuse after fuse, lol!
Good demo though, and the anxiety driven timer is a good mechanic to go with. Maybe just some visual feedback of any 'progress' like mentioned above?
Keep up the good work!