I'll start by saying I know how hard it is to make a video game and I never want to belittle anyone's effort who makes them. In this case, it is genuinely hard to tell how much effort has been put in.
Overall, it earns a 2-star rating. There's poor decisions and boring level design, but at the same time it is a functional game. The Prologue, the one available level (judging by the comments since I quit immediately upon completing the prologue and didn't test the availability of other levels), works start to finish. I can't say much regarding the performance issues mentioned in the comments as I only encountered a brief moment of slowdown when I took out 3 or 4 enemies with a magic attack at the same exact time. As their bodies despawned, all of the particle effects and orb pickups that spawned simultaneously caused some slowdown that went away as soon as all effects and pickups cleared, and that was the only time I noticed any performance issues.
So, it's functional, but it's far from good. The best way I can describe it is it looks and plays like one of the fake video games you might see being played by a character in the background of a police procedural television show. Which, to be fair, does say something for how functional it is. Unfortunately, those fake games never look good or fun, and THUDD matches that part of those fake games all too well.
Perhaps part of it is my fault for missing an instruction, but I could not find a way to rotate the camera. So, from a third-person view you're navigating your character through a series of outside paths, running away from, parallel to, or towards the camera at various points, and it does not feel good. At one point, you're confronted with a platforming section while moving toward the camera, and the platforms you must jump to are barely visible. I don't think it's unreasonable to say it's an significant game design foul. Again, if I missed controls, then I am wrong about some of this, but the way the rest of it plays wouldn't be improved even if you did have camara control.
Occasionally walls will appear in front and behind you and enemies will spawn in, and you must defeat them all to progress. Combat consists of mashing the left mouse button to do a combo attack, and occasionally using your heavy attack which does decent damage if it actually hits but is hard to aim and has a long cool down, or your magic attack which does a lot of damage but only has two uses before you need to find a magic pickup. Magic pickups seem to only exist outside of combat encounters. I never needed to use the block button. You fight exactly two waves of 2 - 5 enemies, and then move forward to the next area where it blocks you off again and you do it all again. All the encounters did seem to have a checkpoint before them, so, if you run into trouble in an encounter (rarely some of the later enemies would hit for a lot of damage despite being too far away to look like could actually hit), you don't really lose any progress.
Between encounters you'll sometimes find a barely out of the way area you can check for pickups, or a naked woman to rescue for no actual benefit (at least at this time). Sometimes there's a door that you need to open to continue on the singular path through the level. A few doors are placed in such a way that they don't actually block you from moving forward and you can run around them instead of breaking them or unlocking them -- finding these spots is the second most fun you can have in this game.
And it progresses exactly like this until the end of the level. For entirely too long. Walk down the one path available to you, get stopped by exactly two waves of enemies, rinse and repeat. New enemy types are introduced as you progress, but the encounters are always the same, the enemies are not challenging, and the combat isn't fun. And that's all there really is. One technique I found for combat did add some levity: you can do a jump attack, or even jump while doing the combo attack animation, and it launches you forward. It's nice for combat, but if you get the timing down it makes getting through the very, very long prologue level a tiny bit better. This leads me to the most fun moment I had: at one point the path slopes downward away from the camera, and the jump attack launched me way farther than it ever had previously. Right into another routine combat encounter...
So, two stars. I wish I felt like it was worth at least three, as video games are hard to make. The dev put some effort into making sure there are at least some invisible walls so you don't do something dumb and get stuck. An interaction with one of the doors sort of bugged out, but never actually broke on me. There is a measure of competence here that I've sometimes found lacking in other efforts by folks making games. But it doesn't make up for the fact that the only fun I was able to find was what I made for myself using possibly and probably unintended parts of the game and fact that the one available level greatly overstays its welcome. I don't think that this can be improved upon without a complete overhaul of what it currently is. If that's the direction the dev takes, I wish them all the best. If not, I can't imagine playing this will be worth anyone's time.
In terms of adult content, it is pretty much all covered in the screenshots included in the description. There is an attempt made to provide a reward for completing the level, but it is on par with everything seen previously and underwhelming for the amount of effort needed to get there.
