Hi there! I understand you're having trouble finishing your Michael Jackson picture in Nostalgia Color where clicking on the color and placing it doesn't seem to work. That's certainly something we can try to fix together.

To get started, could you please tell me a bit more? For example, does the problem happen only with this specific image, or with other pictures too? Also, when you try clicking on a color, does nothing happen at all, or is there some kind of delay or error? Lastly, have you tried closing and reopening the app or restarting your device yet?

In the meantime, here are some initial steps we can try:

1. Clear App Cache: Sometimes cached data can cause these kinds of glitches. On your Android 10 device, go to Settings > Apps > Nostalgia Color > Storage, then tap Clear Cache.

2. Restart the App: Close Nostalgia Color completely (remove it from recent apps) and then open it again.

3. Restart Your Device: A quick reboot can often resolve temporary software issues.

4. Update the App: Ensure you have the latest version of Nostalgia Color installed from the Google Play Store.

If you have already done these, please let me know. There are some additional troubleshooting steps we can explore based on that.

Also, just so you know, some users report occasional selection issues or irregularities with color placement which may be related to app performance on certain devices or with specific images1.

Let me know what you try and how it goes, and we'll take it from there!