The first draft of the engine was unfortunately not able to handle the 'large garbage blocks' correctly so I had to rewrite some parts, it took some time to experiment - but that was a necessary step because these blocks are an important part for a story-mode or a 2-player-mode, possibly also for a puzzle-mode!?
Here's a short video showing the new gameplay/feature, all unnecessary stuff (music, graphics, scores etc) I turned off temporarily!
At the moment I insert these large blocks randomly and manually but it's already fun!