When I complete a task now, it just disappears and jumps to the archive - with no reminder to myself how good I am to have completed this task. It would be awesome that there is a counter at the top of the target list, for example: finished 3 tasks out of 12. Only 9 left!

And every time we finish/complete a task, this number changes, encouraging us to complete, and showing of the progress.

An upgrade of this encouragement counter would be a reward! When you reach 6 finished tasks out of 12, you allow yourself to take some time of, have fresh air, whatever suits you.