Great game. Had a lot of fun playing it.
The art is beautiful. Everything looks insanely detailed for something running at 160 x 144 and displayed in 4 colours. But, like some people have said before, it comes at the cost of clarity. Perhaps having the enemy sprites continuously rapidly flash between colours/a dither pattern would've helped? Regardless, it is impressive.
The gameplay is very fun. The Doom-style controls are responsive, which aids in walking around enemy attacks. The staff weapon reminds me of Hexen a lot in a very positive way. Again, one of the few negatives is that it's hard to see where the enemy (and their attacks) may be, depending on their type.
There are some 3 songs. One of which is used for the game itself. Normally, that would run the risk of making it so that the song starts to grate. But that song in particular is so very good that it isn't an issue at all. Rather, I would want to listen to it outside of the game itself. Reminds me of all of those 90s games in a very positive way. Castlevania, Doom, Mega Man X, etc. There's a possible hodgepodge of influences I can hear here. Cool!
Design-wise, I like the ability to quickly respec the RPG stats at will in the pause menu. But with the right combination of stats, or the right amount of enemies killed the game can become very easy. I killed the final boss before he could even do anything. My personal opinion is that the game could've been a little bit more difficult.
There's a little story, but I think that the focus is more on the atmosphere. I really like the signs displaying the names of the places you're in and such. It adds a lot to my enjoyment of the game, and is convincingly dungeon-crawlerish.
Overall, very nice! One of my favourite games in the jam so far. Well done.