Thank you for playing the game :) Yes a tutorial is really missing here. There is a door at the bottom of the dungeon where you can contine. You can see this in the gameplay video I put on the games page.
After clearing 3 dungeons you come to a save area where you can extract back to base and buy stuff. Though it was already mentioned by some other players that the 3rd dungeon is very hard. :PViewing post in Lucent Depths jam comments
ohhh i see! i really enjoy what you have so far and i'd love to see you keep updating this! this is the kind of thing I could grind for hours. throw in a little back story here and there and i'd take the bait. while I'm aware how difficult multiplayer is to pump out, I would plant the seed to make a co-op mode. cuz sheeeeeeshh i'd go down in the depths with the bois kekw. we tried to do our own gag with a light source but honestly, I like yours better! shoot to light up OP! we were gonna do glow sticks lol but ended up lighting up our cursor.