 If you liked
Ping Pong the Animation
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 ...then you might like
Ongaku
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Both have unique art styles / make use of specific animation techniques that wouldn't conventionally be associated with anime. Their simplicity and exaggeration can be comical (in a good way), which also serve to amplify the mastery of certain scenes. Very clearly experienced animators having fun with their craft.
Ongaku ("music") and Ping Pong are similar story-wise as well. MCs who are extremely talented but are only temporarily motivated. In Ping Pong there's more character growth, while in Ongaku the way the characters are so shockingly good with barely any practice can be seen as either unconvincing or hilarious.