I came to smash some keys and I was not disappointed! :)
Though funny story, I forgot I had a paused youtube video in another window so when I hit spacebar while key smashing, the video started playing and I thought it was narration to the game. I was like... is there gonna be a calming narrator talking about relieving stress while I'm smashing these keys xD
Anyway, concur with everyone else, simple but great at what it does. The interface and aesthetic are great! If you ever feel like expanding this into like an actual game to teach typing, it'd deffs be a hit. You could even keep the key smash thing in after the typing test is completed... RELEASE TENSION IN THE WRISTS! SMASH THE KEYS!
Nice work!
-Sasha