Working DEMO: https://sampleq.github.io/tetris/
Game logic - base on unfinished tutorial https://www.youtube.com/playlist?list=PLqHlAwsJRxAMa9HHLRZcHFZyM7SBHqJgt
Game Logic and visual improvements, virtual buttons (physical buttons behaviour emulation), mobile versions, initial bug fixes - by Igor M. (Sampleq)