I couldn't get the web version to work but the downloaded version works great! The basic controls are easy to pick up although I didn't realise that space had multiple functions initially. I think a small tutorial at the start of the game would be nice but it was intuitive enough even without one.
The overall atmosphere and art are good, and I found that the music was quite relaxing. While I think infinite runners normally have quite stressful music, the chill music fit in well with the with the story premise of two slightly spooky magical friends having a fun game of tag.
I think the only thing I'd maybe adjust is that some of the obstacles in the game felt oddly grippy. If that is intentional I think it would be fun to have some visual representation of that (some ghostly hands trying to grab you or something?). Overall though I would say great game!