the game is quick fun, albeit has some major flaws

it came out of early access pretty underbaked, depending on your opinion it mightve come out way too underbaked, however with everything thats been going on with the developer during the games development, its really a miracle how it managed to get to this point of being able to come out of early access at all.

the gameplay is fun, so far theres only 15 (+1) short levels to go through (depending on who you ask thats a good or bad thing)
enemy and gun variety is a tad bit lacking, though i wouldnt say its much of an issue with how short the game is, its not boring to run through even with this issue (+ the developer is planning to add more enemies later down the line in future updates)

there are other smaller issues that i could point out, however they are relatively minor, if you like classic doom or quake, you might like this, its not great but it is a fun novelty.
in my opinion where this game might shine best is in the speedrun department. as of writing this review the game wasnt really made with speedrunning in mind and doesnt have the tools to make it very convinient like most other games in the genre, however with how the game is structured, the seeds are there, given enough time and polish the game could definitely turn into a very fun small speedrunning game

TLDR: fun game, very rough around the edges, but an enjoyable novelty to run through