-loot weapons, you'll probably need them when you run out of this current guns ammo
-reasonable perk system makes you conflicted over which next upgrades to get as you level up or try different professions
-author is updating, adding some basic niceties while fixing other things (I have only ran into one bug, very far into the game, which will probably get patched soon)
-basic FPS behaviors DO NOT work here, game is very fast-paced at the start of a level but you get to take it slower as the level goes on
-melee is already in, will probably have more rebalancing later
-COSSACK MODE! KICK WITH BOTH FEET
-two of the three "bosses" are original in mechanics, yet still fit in perfectly
-weapons are unbalanced here and there, more complex mechanics could benefit them greatly
-ran into a game-breaking bug, but it's far towards the end of the game and should be easy to fix
-professions don't mean much as there's nothing inherent to the classes
-melee is not a good choice as-is
-levels could use a lot more diversity. if you've played Dungeon Crawl Stone Soup you'll immediately feel like all the levels are pretty mazy, but there's nothing special like a big room, or ramps with one-way drops, or even doors for that matter. If you're looking for Doom-like levels you will be disappointed
Overall 8.5/10. Music, sounds, and visuals are non-grating and fit together, mechanics design is fresh with plenty of room to grow if there's patches, or better, a sequel. Single-player only for the foreseeable future, as overhauls to a lot of mechanics would be needed for a creative co-op experience. Levels get a bit grindy, but it's a roguelike for FPS adrenaline/speed junkies, deal with it. The relative amount of mechanics make it a better choice for someone who wants to try and engage and scavenge as much as possible, but the limits are double edged with unbalances and finiteness to most things. The game is NOT designed to be easy or have a final state where you're basically invincible, every level is threatening.
Honorable mention: The game does not take long to fully unlock everything. After about 10 playthroughs or 10-20 hours, you should have everything and all bonuses. For an indie game, this is definitely a well polished one without any aspects that ruin it by being too easy or too difficult. Some of the information text is silly, but since you don't need to read it at all to play the game, it's a nice separation of the game from the context of the game. Information is terse, useful, and uncomplicated. Really nice to see a game which isn't lacking or overbearing.