Why aren't notifications displaying after matches?

You probably have notifications turned off. In the app, you can toggle notifications back on by clicking the blue switch next to the FITGamer logo.

My workout is too easy/hard, how can I adjust it to fit my skill/fitness level?

You can adjust your workout difficulty by clicking the “Edit” Button next to “Workout Settings”. Set the “Max Per Game” value of each exercise to a suitable value for your fitness level. You can also adjust your match goals by clicking the “Edit” button next to “Match Goals”. You should set these values to be suitable to your skill level.