Crystals of Time, for me, felt like a very nostalgic game. It's a simple point-n-click, hidden object, game. The graphics are beautifully rendered and painted. It's definitely a very casual game that you can always go back to whenever you want. The story is pretty basic and straight forward.
Some people might find it an annoyance to have to wander around to get clues and objects.
But really, all you need to do is access your map to get closer to the rooms you need to be in.
This isn't an mmorpg, don't think that you'll be able to click on everything and expect to find secret spots.
Crystals of Time has very simple game mechanics, you only click what's necessary.
So if you're a fan of simple, no frills, games and want a relaxed playing experience?
Then yes, you'll probably enjoy Crystals of Time.
But if you want to be able to poke around more and get more in depth?
This may not be the game for you.
For what it is, I find it to be a well made game.
The developers knew exactly what they wanted and stuck with it.
Even technically, there was nothing inherently wrong with the gameplay.
It just all boils down to personal preference.