I used to more or less speedrun Beehive Bedlam! I'd finish it without losing a life if I was lucky, must've beaten it 100 times.
My favourite Sky game was Looney Tunes though. The one where you explore a giant hotel zapping enemies and collecting munnies. Whilst I never completed it, the sense of exploration was probably the best on Sky Games. I thought that was the peak of gaming till I bought myself a GameCube. At that point, my mind was so blown by Super Mario Sunshine, I can't even express haha.
There were a few other good ones on Sky. Tom and Jerry, where you have to escape from Tom by jumping around. And Word Crunch to an extent.
PlayJam had a ton of good ones too. Bombay Slots was ridiculously addictive, and the RNG was pretty lenient for a slot machine.