Thanks for this great feedback! To address your points:
1. Thanks. I think I know what happened. Strange it didn't occur in my testing, but I have a pretty good idea how to fix it.
2. Yay for player-facing error messages! Thanks for reporting. Another one that slipped through testing. Was this the download or browser version?
3. There's nothing beyond that room yet anyway. But in that room, if you managed to get across the gaps, is the third attack unlock.
4. Yeah, the combat is a common complaint. I'm not a great gamer, so when something is hard for me I figure it will be easier for others. Well based on feedback I'll be speeding up combat and making these guys a little more sleepy.
Again, thanks for the feedback.