I feel ya on the arcweave thing. Once I realized I could make timers and TWO buttons that weren't choices, and I could move buttons / make them invisible based on variables... it opened it up a lot but I didn't have time to USE this opening at all. Made a NES-style typewriter-text-in with bloopity noises for dialogue — didn't use it cuz scared it would break on mobile... but yeah you could in theory make a reasonably well featured sokoban game or a board game like Catan inside of ArcWeave if you wanted to write completely insane CSS. :D
I don't think ArcWeave intends to allow as much CSS as they *do*, honestly.