Back in the '90/91 season I saved up my allowance money and bought the G&W version of Super Mario Bros (KMart had it on clearance so I was able to get it for only about 20 bucks) and that held me over for about 5 months until we bought our NES in April of 1991 later that year (I have a crazy good memory for these things). It's seriously the best LCD game I ever played, it had authentic scrolling platforming gameplay, separate worlds and even warp zones! I sold it in the lead up to getting the NES, but after many years I got nostalgic so I bought another one off eBay last summer, wasn't cheap this time. Here's a pic (system was mint but box is scuffed):