I have the CV version in cart form. You are correct, the control is difficult and the game speed is too fast at some points. For whatever the reason, CV ports often have this. Tutankham, Miner 2049er, a lot of the precursors to side scrolling, the character moves too quickly. With all that said, I prefer the CV over the 2600 because of the HUGE graphical improvement.

PS: Did Imagic ever make a bad game? They had many of the best games on the 2600, with some of those great labels, too. Their Intellivision games were all very good, and had great graphics, and the Colecovision games were impressive. Really a shame they went under during the Crash.