Currently around 70% finished. Check out the demo if you want to see

Step 1: Sleep to get energy to do the other steps!

Step 2: Disable target momentarily when hitting a wrong key.

Step 3: Polish by adding more visual feedback and basic tutorial elements.

Step 4: Title Screen

Step 5: Basic Credits Screen

Step 6: Composing more tracks for the theme music – in Polytonia, success is all about playing music with great timing skills.

(optional) Step 7: Polish graphics further.