Cool game.

But I think that sometime it is hard to not lose when you have to jump.

Maybe a double jump mechanic would be an interesting feature. ;-)

Great endless runner game.

Some improvements I thought of

1. Parallax effect on background image.  The cave background already looks great but I think it would improve the look so much.
2. Bullets instead of hit scans. It just gives the player more information about who gets hit instead of thinking "man that didn't look like it was gonna get me"
3. If you fall down and then fall down again before the text disappears. on your next life there will be no countdown to tell you when the running starts.

One of the more pretty loking games in the jam. It needs some variety but the lack there of is understandable. With a little bit more work put into it, it has the potential to be quite fun.