jpuroila is right. if you require the mouse to aim, then you need to make the controls WASD. As a culture, we worked this out ages ago - WASD is move, Q or E is interact, mouse to aim and fire. It is known.
Reviews for "Parallel World - The Hero's Journey"
What looks like a jet pack armor upgrade kills you if you touch it.
What looks like an explosive mine from minesweeper is a powerup.
There are also plenty of levels which must be solved through trial-and-error and not simply logic and dexterity.
There was also at least one time when the game lagged and it resulted in an unnecessary death.
its amaziiing :ะท
x for interaction - one hand
arrows for movement - two hands
mouse for shooting - three hands