Hey! It seems like there's some taxing vector drawing stuff going on... The longer you play the more obvious stuttering gets, but it gets reversed back to normal by pausing the game and opening a menu (rewards or help screen seem to help most of the time for me)
(It's worth noting that i've been running it on an obscenely old laptop by modern standards with all the graphics toned down so i guess it's more of a me problem lol)
Other than that, great game! Can't wait to see more!