I think it's a really great concept for a puzzle game! But like others have commented I struggled with the trial-and-error aspect. I ended up stopping at the level with 2 spiders at the top because I just had no clue how to anticipate their position that far into the mole's motion.
If a ghost of the spiders/ants moved as you tracked your path, I think it would take a lot of the trial-and-error out of it. Then it would become about the actual puzzle of trying to get the mole in/out of sync with the obstacles. :) Just my 2c and I hope you continue to develop.
Congrats on a solid entry!