Hi Dash,
So as promised I have played the game more, both on a MacBook Pro 15'' 2018 and on a stationary Windows based PC.
There are definitely a lots of improvements here in overall feeling of the gameplay mechanics polishing, bigger bug fixes etc. on Mac (I haven't played v1 on Windows).
I was able to almost finish Level 10 boss escape, but it was taking me lots of retries. And those vertical platforms where I stuck... #$@! lol ;-). I will try again in future.
Game in general is fun to play. The music fits very well. The same with story / narration and mood. I think it has potential for a larger audience adoption, maybe with introducing some graphics etc.
Issues / improvements proposal:
I still have some problems here and there with jump not reacting on time or easily sliding from the tip of those thin vertical platforms. And it would be nice to have a little bit more control in air. I think it may be a slightly bit worse when playing on Retina display or maybe in general depending on resolution some accuracy may suffer a bit.
Maybe I am just too old ;-), but the game is rather hard, which can be a good thing and I guess it is rather by design here. However, you could consider some difficulty levels or optional adjustment options like more save checkpoints, so less hardcore platformer players could enjoy it too.
It would also be nice if the progress was saved on a checkpoint, not at the beginning of the level. And those vertical platforms mentioned before can be really annoying especially combined with a slight lack of control precision at times.
[Shift] is for dashing and [E] for platform switching. Combined with [Space] for jump it was rather not the best keys layout for me. But maybe it was just me and it depends on the keyboard so probably asking others would be helpful or just to consider making keys mapping feature in future.
A button / option for skipping death & respawn animations or a longer introduction at the beginning of Level 10 could be a great thing too. Combined with many retries it is time consuming and not for gameplay, but for waiting.
I know you are busy with the new game, youtube etc. but maybe you can go back to Cube Run sometime in the future for making some adjustments / improvements.
Keep up the good work!
Dawid