Loved being to play on my DS lite and gameboy micro with a flashcart. ( I like retro but I need a backlight sorry original gameboy). Got 2 out of 3 secrets before I got to the ending. I was about to give up with the space invaders mini game but just button mashing in one spot until the row cleared before moving the next got me through the first 3 levels. Usually in this type of game I would constantly move while shooting. I could not get past the 4th level. High quality GBstudio game thanks.