Great job! Super polished experience, your profile description does not lie ;)
Loved the re-rolling system, it ensured that the rng wasn't frustrating since you had more control over it whilst still letting you get excited over the rare occurrences (like getting enough yellow dots to perform a special attack).
The fact that you created this by yourself in only 48 hours is astonishing!
My only point of feedback would be that I found it difficult to know how close I was to defeating the boss, loved that you got hints for what the boss was about to do though :)