If Adventure games are not to your liking, then come and try out this highly energetic shoot 'em up titled ' Operation Fungus ', developed by Jani Nykänen. This game is a 2D arcade like shooter, whereby you have to kill enemies to obtain not only a high score, but to later use to upgrade your skills! Also, as the developer describes, In each state you must fill the power gauge before you can fight the boss monster. The more enemies you kill in row, the more crystals you gain, and thus, the faster the power gauge will become full. But beware, if you take damage, you will lose 10% of the power!