Cosmic DJ is, all things considered, indeed more of a toy than a proper game but it's a pretty fun one.
As the titular protagonist, your task is to help people and fight bad vibes by filling a bar, you do so adding instruments to the track that's playing thus creating your own songs.PROS:
-while extremely simple,the gameplay is very fun
-nonsensical yet entertaining story
-top notch sound (created by you aswell)
-good amount of different instruments
-intuitive controls,whether tapping or using a grid it's easy to choose instruments,their tone and when they'd appear
-charming graphics, they're simple overall but there's nice little touches, like the various instruments changing the scene whenever they're active during the track
-good sense of humour through the whole gameCONS:
-very simple gameplay, you can just click randomly and win, if you're so inclined
-very short, if you try and make some decent music it'd take you about an hour and a half
-screen flashing is sometimes overdonehttp://steamcommunity.com/sharedfiles/filedetails/?id=450843453
Overall I found Cosmic DJ to be a fun albeit limited game: creating your tracks is an interesting experience and it surely tickled my creative side while the funny story was enough to carry the game through its duration.
For 80 cents on sale I think this'd be an interesting experience for most people, even more so if you're interested in music.