Time Lord

Here we control a time traveller. To get from one era to another, you have to collect 5 orbs. In the first level everything is easy to find, but in the later ones the orbs are well hidden and you have to think hard how to get to them. At first, the hero can only defeat enemies with his fists, later he finds weapons. The complexity of the puzzles and the not-so-comfortable controls make it unlikely that you will be able to finish the game in one go.