Hey, thanks for playing! Great minds think alike ;)
Interesting thought on the CRT filter. That filter was only doing two things though: applying the bend, and applying a slight chroma shift akin to CRTs. My guess is that latter effect is what was making it appear blurry (particularly more so near the edges of the screen).
The relics (level up rewards) were a bit of a last minute addition because I felt the game was lacking something. I think more than a few of them were bugged or working differently than I had written them. Apologies there! Also the deck pile number error is interesting. Originally I was manually adding/removing the number from it, which caused that bug a ton, but I thought I flipped everything to be array.Length+1. Guessing a missed a spot.
For secrets, the Cellars also had them, but they’re harder to see due to the low light.
Thanks again for playing!