One of the fun things to leveling up was the rewards. According to my phone this photo was taken on October 6, 2019. So it looks like I was trucking along at a decent clip from when the game launched on June 20, 2019. Well done, past wizard/* me!
A couple of reward items of note: Silver Keys and Spell Energy
Silver Keys were used to unlock Portkeys (only after walking anywhere from 1K-5K to fully unlock). The silver keys were good for one use only. The gold keys (not pictured) could be used over and over again. I only had the one gold key which came default with my character. Silver keys could be bought in the shop or earned or sometimes (rarely) found out in the wild.
The lightning bolt was Spell Energy. It took one Spell Energy in order to cast a single spell. So making sure you had enough while wizarding was very important. There's nothing worse than running out when you're in the middle of battle.
You can find out more about the ins and outs of the rewards at various levels from the Eurogamer website
Here is a video from the early days showing the various levels, rewards, and shop pricing from Go Shiny Hunter on YouTube. Source Playlist
