Stats are funky, they are labeled odd but follow the normal pattern for games in this engine. So you get the following:
ATK=attack duh
DEF-defense also duh
dick cum= magic attack (uses the magic attack ups with the potion girl, does not seem to go up from using dick masturbate/cum skills)
cum= magic defense (uses the magic attack ups with the potion girl, almost all enemies from 4 stage on use magic, does not seem to go up from using masturbate/cum skills)
milk you drink= Agi (if you attack first, also probably hit chance, increases from drinking milk drops so don't bother buying Agi boosts from the girl, you can drink milk even with full health so you can raise this super quick)
semen you drink- Luck (crit chance and status effects working on enemies/not working on you, increases from drinking semen drops so don't bother buying Luck boosts from the girl, you can drink semen even with full health so you can raise this super quick)
However most late enemies do insane damage and double attack, you're your best bet currently is pick an attack stat to pour points into while keeping your agi high to 1 shot everything first.
Looking in the files there's image for a lot of things (like spider/centuar/alien boss) that I can't find, I assume they aren't actually in yet or do I miss them?
Overall like the game. Enemy art/design is really well done. Like how the enemy infections/mutations give actual bonuses too (but wish that was shown somewhere.) Getting those also seem to auto unquip armour, which is a pain. However the xp/leveling needs a rework. Early enemies give nothing and later give so much I was at max level with 2 more stages to clear still. Once you're in the 2nd stage (not the first enemies, they are oddly harder then the later ones and give much less xp) and can 1 shot enemies you can shoot up far too quickly. Also it takes an actually minute on walking to go through the empty train near the end which seems like too much. Can't wait for the finished version.