This new techniques have been discussed on SR discord and it is called the 3 fingers technique. I personally created and named the technique myself.
The 3 fingers technique is known as putting 1 finger on the Jump button and the other 2 on the left and right arrow. Originally, when you play Level 1, you only press right button and jump, however, you won't be getting near 6.61 seconds.
In the 3 finger technique, when you step on the middle boost line, you tap the left arrow while still holding the right arrow button, you are able to increase speeds. However, just tap the left arrow slightly so that you won't lose time.
Using this technique, will lower your time drastically and it will help you in speedrunning this game. It also makes me obtaining Speed Run Level 1 Glitchless WR of 6.61 that tied with ChocolateTheGaming (me), SkipJump, Blippys, Lucy8, TweniThree, CancerousError and many more. In addition, I also obtain other Glitchless level WR :D :D :D
3 Fingers Technique found on the Year 2018.... New Year, New Time (Note: Some Speed Runners might know this technique earlier than me, however, I just know this new technique)
@Bogi2323 I have broken several records with that technique :D