Nice job here, like the atheistic and it was fun to play :)
A few (really minor) notes:
- You can't appear to jump if you fall off a platform (e.g. in the air but not as a result of jumping), this led to a couple of annoying incidents were I went to jump off the edge of a platform whilst moving but must have just left the platform and just fell into oblivion with space bar doing nothing. This is such a minor thing though, and once I got used to it, it was ok (and it could be intentional, since you can't jump off air irl xD).
- The checkpointing system was neat, and saved a lot of frustration (whilst still resetting back to the beginning if dying too many times, this was a nice balance). Liked how it also kept any trash you had collected, similarly saved a lot of otherwise boring running about doing bits already done.
Did have a little bug where I died trying to jump onto a 1x1 to collect some trash, died but respawned ontop of the trash and collected it xD.
Overall, nice job & good work :-)