Not bad actually, sort of on a par with the atari 2600 early stuff. Hmm well actually maybe a bit crappier. The maths one has kept me well entertained cos I realised I can't do multiplication LOL!
Done a lot of web-research today and it's an interton vc 4000 clone-ish. this site
has all the games for the interton listed, and the ones I got are all exactly the same as they are shown there.