I got confused and thought UFO Robot Grendizer is Megaton Musashi and was absolutely shocked with how low budget and stock engine/asset flip like it feels.
I was conflicted they get some things like the style (though lod pop in is crazy bad all over the place) then botch tiny levels, invisible walls, the hit reactions, etc.
I kept thinking ok, it's ok I guess but couldn't it be a little bit more polished please, like low budget games like Platinum's Transformers game or a Level 5 game?
Now I feel kinda bad because it apparently is a small time studio's game after all (though I think they could go lower than the 40 EUR) but feelings don't change.
I'm going to guess that even with tempered expectations it starting off with 100% positive rate is mostly because of super nostalgic fans of the old anime series.
This:
Is not this:
Though one of the various Megaton Musashi versions/updates so far did have a Grendizer collaboration (an anime show reboot is coming in 2024 apparently).