Good concept! I like how the roll of the dice is somewhat of a dual purpose mechanic, and if you know anything about GMTK, dual purpose mechanics are very cool. My only problem is that it feels unpolished. I think the worst and most notable case of this is that it's hard to tell if you take damage unless you're constantly looking at your health bar, also making damage feel unsatisfying. Maybe a screen shake, some red vignette or a white flash on the player, and knockback would help sell this impact more. Also, the slowdown feels a bit...buggy. It's hard to say exactly why, but I feel like the slowdown is based on my velocity, not my intent to move, so sometimes it's slow even when I want to move fast and vice versa. There were also some other minor issues, eg enemy scaling and crappy ui placement, but overall, I think you did very well!