I dared to jump into the hole. I think personally that dodging the enemy attacks felt extremely unfair at times and quite finicky. But the graphics and audio were nice, although the audio did get a little repetitive after a while.
I got the final boss down to like 20% health, but After 20 attempts, still had not beaten it, it would get a hit in every time I crossed over to the other side of it once I hit the wall, and I couldn't hit it enough times using the only tactic I could find that left me not getting hit most the time before I took enough hits to die. I thought it was clever to have to go backwards on the last one, despite the signs showing the other direction.