Don’t know how I missed this one! Two years ago, YouTube user Deatrathias discovered a glitch involving pick-up items and energy tanks. It seems that if you access the sub-menu while collecting a health/weapon energy pick-up item, the game registers item usage within the sub-menu, which results in the use of an energy tank. If you don’t have one, then the game gives you negative energy tanks. I was unable to recreate this glitch in RKS version 1.06a and the RKSF web trial, which leads me to believe that the bug was fixed by disabling menu access (or perhaps controls entirely) upon item pick-up. Still, I thought this was an interesting little thing. Perhaps there are still a few other distinct bugs in the game?