Absolutely delightful, just played a few rounds.

I really love ATC games and the "draw it by hand" aspect makes this kinda funny. Maybe I need to try with a real mouse, kinda slow on a trackpad. For a more serious entrant in this genre (with speeds, altitudes and radio navigation), check out Endless ATC on Steam.

I landed some 40 flights and made it near the top of the leaderboard.

The scoreboard is taking too much screen space and occluding the planes, would be better to have scores at the top or bottom.