Totally agree. Sfx are bugged but I'll fix it after the voting period ends.
As for difficulty, unfortunately I didnt have much time to work on the chunks that are stitched together (making it "endless"), and the lack of missiles/laser beam really takes away a lot of the tension. I also completely forgot to ramp up the speed as you play, so it ends up being very monotonous so you're absolutely right. As for the leaderboard - it isn't actually connected online sooo ye its just for show for now xD
Post-jam version will have a bunch bugfixes and improvements, and actually adding the missing mechanics and items and what-not to make it more fun and increase replayability