it's one of their earlier games... very early. So rather unpolished and all in all rather rough. The animation can also get rather creepy at times, mostly due to how inhuman and/or unnatural it looks. There's also one puzzle in it that's near impossible to solve that cause many to skip, and there's no set start, and it changes each time you restart, so there's no easy "check solution online" for it.

And oh, watch out for Time Mysteries 2 too... there's a bug in one of the puzzle where you can click on something before you even start on/unlock the puzzle, and if you do that, once you start the puzzle, it becomes unsolvable. And there's no reset/restart button for puzzles. It was reported and AM said their QA was gonna fix it, but it's never fixed till now, a year or more later, lol.

It was the first game they published globally, and it was a bit dated even upon release. Since you are new to HOGs, you wouldn't be ready for the old-school HOG mechanics. Not to mention that while they spruced it up with cut-scenes and voice-acting, they just used simple tricks to animate the previously static images. They also tried to modernise the game mechanics, but it somehow made it a bit worse than the original release.
The second problem is that Time Mysteries 2 for some reason acts like as if it was in a totally different universe as the first one, and it is not a particularly good game either. And as a final WTF, the third one manages to somehow still explain how the first two games were actually related. It is a pretty good game and manages to wrap up the story surprisingly creatively, but you'd need the previous two games to understand it, and, well, it may be a bit of an ordeal.

Abyss, on the other hand, is one of their best games.

(Delayed) thanks! ^^'