It's not possible to end the game

[00Whitehacker00]

Expected behavior
When all the puzzle pieces are in their correct place ie. the puzzle is solved, a message should be shown informing the win. Or the app should take the user back to the canvas area automatically. Basically something to indicate that the user has solved the puzzle.

Actual behavior
When the puzzle is finished, nothing happens. The timer continues. No indication of finishing the puzzle. The user has to click the back-button theirselves to go back to the canvas area.

How to reproduce
Download application.
Make drawings of your choice, then click on the puzzle option at the top bar.
Select stage or level of your choice.
After the puzzle has been finished, wait.

Devices tested on
App version 1.0
Device: Nexus 4 (API 30)

[jpaulynice]

Hi! Feel free to submit a pull request on how you think it should work. The idea was to have others contribute to it. Thank you!