Pretty fun! That had a very completed and polished feel to it. No janky interactions or browser issues for me. I did have the mentioned bugs regarding the stops, but not a big deal, especially if you already sorted them out. No worries. I enjoyed the theme, and the puzzles were a lot of fun. As a long time Diablo fan- I'm proud to say I didn't struggle. Well, maybe once or twice. xD
Your artist did a fantastic job on the level selection map! Excellent vision and follow through on both of your parts. ^^