Entertaining game! With quality voice acting :D
I think the atmosphere is great. The dungeon looks quite pleasing visually. I would've liked to see a confirmation before going to the next level, because I was unaware of it when it got triggered. I don't think I've explored everything in the first area. But in the grand scheme of things I don't think I missed out on anything important. The sewer area was also quite decent, but not as interesting to go through. Then with the cosmic space level, it was quite intimidating seeing the eye, so that was fun! I stumbled into a weird alien enemy for the first time, and when I killed him I got the game over screen. So apparently that was the big boss, which was a bit anticlimactic :D I didn't even explore the space level yet, I just stick to the left and I reached him almost immediately. The fight was tough but it didn't feel like a bossfight to me.
I think the door keys were a bit cumbersome, as at some point I was hoarding them because they didn't fit the lock I wanted to open. Some kind of visual differentiator would've helped a little. And maybe have them be consumed on use would make it more manageable.
I didn't use the rest feature and I only drank two health pots. Didn't touch the blue pots so I had a ton of them. So the combat may have been a tad too easy. Inventory management was a bit tedious but in a good way, as it makes combat more interesting if you have to switch or use other items.
Voices were great. Minimap has a cool implementation but I didn't use it much. Some item tooltips would've been nice (weapon stats, what the potions do, etc), but those are minor things.
Overall a pretty solid game! Good stuff :D