Not a bad game so far! I do enjoy dungeon crawlers, and this is a solid start. A few notes, though:
- The lighting is really good, but the flame particles get in the way of the camera a lot.
- Honestly, the combat is really clunky... it's hard to tell where your sword will swing and when you can swing again, and the stamina bar doesn't seem to work properly. Also, dodging enemy attacks is seriously difficult, and I can't tell whether the enemy shields block attacks or not.
- More sound effects would go a LONG way. Even a simple hit sound, miss sound, and enemy death sound would be huge - right now, I can't really tell when a hit connects, and sometimes an enemy who seems to have been hit and killed will still be able to attack for a while. The player hurt sound is also... not very good, honestly - it doesn't really sound like a "hurt" sound, and it's a bit grating.
- Gem collecting is satisfying, I like how they shine. Enemies drop a LOT of items, which helps with the difficulty a bit, but it feels a bit overwhelming, and I'm not sure what adrenaline does.
- Nice level design! It's simple but makes for a fun time spelunking.
- The main menu and death screens are really fun, the text is flavorful and the visual and audio effects are great, though the main menu is a bit plain right now - maybe some sort of a fire effect would be nice?
- I like the upgrade station conceptually, but I haven't really felt the need to use it much.
- The game does seem to lag a fair bit, especially after a couple attempts - some optimizations could be nice.
On the whole, I think it's a solid start, but the combat and audio in particular could use some polish. I assume this is just a start to a larger project, so I can't wait to see where you go from here and how you improve things!