Just to mention, its impossible to carry on doing the Time Challenges when you get to Gene Gadget as the lift in the third section of Act 1 that checks if you have all Flickies or not does not send you to the exit portal as you don't collect them during Time Challenges.
Other than that I am done with my play through and I have enjoyed it so much, I want to aim for 100% but I cannot until what I have said is sorted out now. I also feel as though the 5,000,000 score mark is set a little too high to unlock the last few percent as I got around 1,200,000 upon completing the game and challenging all Tails and Knuckles stages and finishing the Time Challenges as far as possible.
Perhaps 2,500,000 would be a good mark.
It's fixed now!
OK, I'll bear all that in mind, and thank you