It's not as much of a resolution changer as a hacked Jazz2.exe with the additional resolutions as options. I figure it would be fairly simple to add the 16:9 (as well as probably more ratios) resolutions.

I supposed that the rescap of 800×600 would have been enough but if you guys want to go for 1024×768 then be my guest. Just be warned that 1024×768 is where the game starts looking weirdly small in fullscreen (and the layers are broken even harder).Normally you would have to crouch or get off the platform to see the power up spawning. If anything, I consider that as an argument of 800×600 speeding up the gameplay (in a very minor way).