I made it to level 12, which is the room that introduces diagonal lines. It was a nice shake-up for sure but maybe you could have thrown them at me in a safer room first haha.
it's a fairly simple idea, and I felt like there was too much waiting around to want to replay it for the clear. on the other hand, it's decently fun.
Also, I felt like at some point you could stop showing the message that tells you "collect all gold!" when you cross over the goal. Especially in the room (9?) where the goal is right next to the start, it just felt silly having a text box obscure the screen while I'm sitting on limited lives.
I like the player character's idle animation!