Bit of a let down

I found this on reddit and had a lot of fun with it on the computer only to find out that the app version is riddled with in-app purchases. All content that was free on the computer now has a big old price tag on it. Very disappointed as I was excited to play this on my phone.

Darkchocolatemochotwist about Touch Pianist - Tap in Rhythm and Perform Your Favourite Music, v1.0