First of all, stellar use of the limitation. Not only in the obviously great gameplay mechanic, but also in the other ways the theme can be interpreted (Paladin).
I really, really like the game feel. Scavenging for good dungeon crawlers like this isn't easy! A lot of games in this genre offer weak gimmicks, and/or fail to offer you enough tools to deal with your enemies. A great example is Hexen II, a game that by all means should be a great of the genre but has so few ways of dealing with ranged enemies as a melee-oriented class that you simply have to take mandatory damage at points. Like the Quake it was based on, but only with the melee weapons.
But I digress. This game is the opposite of that. Each of the 3 enemies require different strategies that revolve around the effective use of your melee and your throwing light. It was very satisfying figuring out how the robot is bested. This strategic AND innovative approach to first-person dungeon crawler combat is a breath of fresh air.
The art is also superb, and helps sell the feel really well. The only minor issues I have are with the sometimes unclear minimap and a lack of a suitably dungeony tune to accompany your dark voyage. But of course, none of that is a requirement in a game jam game already this polished.
On the controls end, it's mostly excellent but the double esc for volume control is also a bit weird, maybe it could've been another key? Also, the game, the light mechanic might be liable to being misunderstood by a few players? I don't know, wasn't an issue for me but maybe it's something to think about.
Amazing job all around! Please take this forward. I would buy it immediately. There's such a dearth of good, handcrafted games like this that we end up being down to Lunacid and... Dread Dimension? The latter of which isn't even in the same genre.