The Difficulty Spike is weird, sometimes there is no way to survive as there isn't much space.
At the start you are able to restart the game without out even starting it(Small bug but fixable with an if statement)
Overall the music and SFX is really great and the Endless system works well. The Art also suits the Main idea so that's great . Idea is neat with some more core mechanics and a slightly better gameplay loop will help IMO. A really decent game for a first Game Jam