Thanks for playing! the HP recharges with the green tentacles and diminishes with the red ones
The tentacles' main thing is the vector math needed to position each segment end point on the next segment start point, I'll soon release an update to https://raxorg.github.io/Alejandria/ which is open source and will include a tentacles demo :D Too coward for a YT tutorial yet hehee, you encourage me tho ^~^