The Alt level is the first level in which you partake in. It's a relatively simple level and has hit the buttons of the balls rolling down, finding Pokémon as you go through. The keys you use are just the Q, A and Z keys

Bronze Medal Requirements:
Successfully press a letter corresponding to a ball

Silver Medal Requirements:
Successfully press a letter corresponding to a ball 10 times in a row

Gold Medal Requirements:
Successfully press a letter corresponding to a ball 20 times in a row