itch.io

You start by pressing E, the gem then moves to your cursor.

Now the first power, indicated by the gem being blue, is to bring something from the past into the future.

You scroll down on your mouse wheel and time rewinds (up to 3 steps).

When you reach your desired point in time you left click on the thing you want to preserve in the past and everything else resets back to the present. (Basically just winding back time for your selected object)

Once you unlock the second power you can right click while the gem is at your cursor and it will turn green.

Now you select an object in the present that you want to stay there and then scroll down to set the world back to your desired point in time.

You left click again to confirm and the world stays at that point in time while whatever you selected remains where and how it was in the present.

You can always cancel the gem by pressing E again, once you use the power you can not change back beyond the selected point. You can always restart a level in the ESC menu (first press cancels move/attack second opens menu).

I hope this helps, I can be bad at explaining sometimes.