After these recreational mathematics videos—which introduced topics like fractal dimensions—grew popular, Hart was featured in The New York Times and on National Public Radio,[4][14] eventually gaining the support of the Khan Academy and making videos for it as its "Resident Mathemusician".

[15][16] Many of Hart's videos combine mathematics and music, such as "Twelve tones", which Salon called "deliriously and delightfully profound".

[19][20][21][2][22] It created the game Hypernom, where the player has to eat part of 4 dimensional polytopes that are stereographically projected into 3D and viewed with a virtual reality headset.

[23][24] In June, eleVR released an open source web video player that worked with the Oculus Rift.

[25] In the same year Hart created the playable blog post Parable of the Polygons with Nicky Case.