Yessss, number go up !
Loved it. This stratches an itch in my brain. Cleared extreme level with the legendary exponentiation.
A few issues I ran into:
1. While the loop runs, you can still press "Undo", which is completely OP
2. I once got a run with this nested for loop
for i in range(1, score):
Even at BRR speed, the executor was doomed to run forever, hahaha. I had to refresh the page to get to a working game state. An "abort" button, or a timeout could be a nice addition.
3. The selection overlay seemed a bit broken, the gray lines lit up in blue did not correspond to the position of the mouse, nor where the line ended up. Luckily, the line did end up where the mouse clicked
4. It was frustrating to not be able to replace an operator without nuking the operands. I don't know if it's a design choice or a feature that would have taken too long to implement.
5. The tutorial is too prescriptive, as you have to do exactly what it tells you to. "Invalid moves" are still possible at that stage, but they are immediately discarded, which confused me.
These were completely overshadowed by the fun I had, though, so no big deal :)
Awesome potential, great game for a jam, kudos