Oh, like how close you can place blocks re biker? I did not even think about that, very good point! Because the way I've done the biker logic, technically you could get blocks in line to make him go up one row, but because check says it needs to boost one block before the raise, it'll still crash - in the end I thought it was very edge case and it was more important to polish other bits, mainly get HTML build running more smoothly.
Thanks for playing and glad you enjoyed it :)