Really awesome work. I had a ton of fun playing. I've actually played through it a few times now just looking for/playing around with different blessings. You really nailed it with the atmosphere, and I loved all the pixel art for the monsters and the lamb.
The only issue I noticed was a bug where you could get both blessings (and/or duplicates of the same one) after picking one from the lamb. Basically, once the lamb gives you a blessing, even though the blessing choice window goes away, the blessing icons inside it remain clickable. Clicking them will flash the blessing choice screen and give you another blessing. This hidden screen remains available until you leave the room with the lamb. The blessing choice from the altar inside the dungeon doesn't seem to have this bug.
That aside, it's really a fantastic game. I can't overstate how much I enjoyed this one!