20 minutes till dawn is a very flawed experience, that doesn't stop it from being an interesting roguelite.

As far as content goes there's not enough unlocks and stages to keep you going for too long and there is little to no incentive to do the other two stages on max difficulty. I got about 30 hours in this going for steam achievements and feel that's quite a good investment on the 5 smackers it costs. All of the guns feel mechanically unique and honestly are more important than your character choice unless you pick one of the broken ones (there are like 3 out of the 9). The boss enemies change the flow of the gameplay a little too much for my liking? specifically the laser one at the end is very tanky at max difficulty and unless you're pumping out massive damage not much is gonna be happening while you whittle it down and is much more annoying than the exciting end of run fight they were going for.
The visual design is kind of whatever, you can tell the dev didn't start as an art guy. The characters in game all look good and the portraits had love put into them to varying levels of success. the only real problem I have is that with so much going on at once having only 4 or so colors to go off of for visual information can get a little hard to parse.
Can't think of anything else to say review over!