I found this on a car boot for 50 pence and thought 'why not.' But let me tell you, i'd rather keep the 50 pence!
Once you've worked out where to go and what to do, the game FINALLY kicks in. But even when you're jumping (which you do a lot) and fighting, the game still doesn't do a lot. for you. That familiar feeling of the brilliant original GB games just doesn't exist. The soud is just the oboring beeps you get put in games to keep them going, and there is absolutely no replay value.
So if you find this game for 50p, don't waste your money, go to the corner shop and buy yourself a Kit-Kat. Yummy.