Glad to hear that you enjoyed it and thank you much for the feedback!
A map is definitely a feature I would have loved to have been able to work on, but sadly I ran short on time so I had to dedicate most of it to getting the core content done (which is also why there are unfortunately no bosses in this version). If I do get around to making an updated non-jam version in the future, you can be sure that a mapping system will be on the list of features to add.
On the topic of changes since the original version, the original only had one enemy (fly), very few background tiles (and no animated ones), only the first three upgrades, no player character animation, a different jumping arc (only three tiles and no short hops), and no saving system. Lots of new content and visual upgrades went into this version.
Thanks much for playing!