Ninja Scroller by Mars Touch Studio - ALPHA 08 or BETA 01 WIP - How long?

Ninja Scroller ALPHA 08 or BETA 01 WIP

It takes me about 1h00 to complete all the levels and 2h30 to unlock all the achievements.

For someone who is new to the game, it will be much longer.

And the majority of players will never finish the game!