The lag is a know issue with Lecode's LeTBS plugins. I've reduced the scopes of the skills so it shouldn't hang as much.
Thanks for bringing that to my attention! I forgot that I updated some maps at the last minute to match thematically, but didn' t update the tileset configurations.
I to discovered friendly fire through killing myself. You're meant to be a little squishy and suffer the occasional death. How often you have died will eventually factor into the story and unless it happens within the first few battles there is no tangible penalty for dying in the submission other than having to retrace your steps a bit. There actually a little bit of a teaser for future plot if you do die.