Hmm, yeah, I'm torn. I like the idea of difficult arcade games, but then again, the gameplay is a bit monotonous for having checkpoints so far apart. I sorta like the gameplay, but I don't feel like playing past stage 3 since it's just not engaging to do basically the same task over and over again without making mistakes out of being careless since it's the one millionth laser barrier. So, what I'm trying to say is... I like the idea of that arcady rare checkpoints design, but I think the game is focusing too much on not having the player getting tired rather than being excited for learning how to overcome the next obstacle.
I enjoyed the music, art style and precise input and gameplay of the first two stages a lot!
Hope this feedback helps somewhat! :)