It is really a uphill task?

This game tests your reflex and accuracy.
If you have both, most probably will be the top scorer!

any better tips?

Use a good mouse.
Make your mouse stay at the horizontal line since the hand sign stays at the same y-axis, only move left and right.
Make your mouse stay at near center since hands appear near the center most of the time.
Try to keep at byogodlike spree since it give most scores.
Finally, make your com lag to reduce the rate of energy deductions.

What a nice strategy for lag...