Nice game! I had some graphical errors that increase the difficulty!
On the second playthrough I realised it tells you what block you are hovering over, very helpful. Good game design.
Wow, this was one of the first bugs I fixed, and I don't know how it persists on your machine. Thank you so much for taking the time to take a screenshot! It really helps.
Since I plan to continue updating the game after the jam, I'll fix this too.
You're very welcome. If it helps, I was playing in web browser using Google Chrome.