Hmm, kind of fun. I got to about 500m. Does it change a bit after a while?
Also, is there always a "solution"? Is it random? Did you make sure not only that there is a solution but also that the difficulty of jumping is gradually increasing?
Yes, yes, yes and yes
Every Xdm, the block pattern changes to one of several. The actual game also mixes in special effect blocks with the normal ones.
The patterns are such that there should never be an impossible situation, although some block sets are definitely trickier than others.
As for the difficulty, I originally tried to do it with the block sets, but it became impossible when it got to just one of each colour. So now the incremental difficulty is based on the Roving Eye of Glorious LEADER, which has been tweaked in the current dev version.
Also 90%! The game is now feature complete. Time for polish and extras!
Once in a while there are some ghosts in the code that cause an impossible edge case to happen, but I've added some solutions and am thinking about more.