Thank you! We're really glad you enjoyed it.
You're absolutely right—that kind of ability-gated exploration is a core part of the Metroidvania genre. However, during a jam, players often spend very little time with each game, so we decided to give them most of the movement abilities from the beginning and treat this version more like a demo.
Wall sliding, wall jumping, and unlimited wall jumps were originally designed as abilities that would be unlocked later in different areas. In fact, the systems in the code are already set up to support that progression.
We're currently working through all the feedback and plan to update the game after the jam with more mechanics, levels, progression systems, and reasons to revisit previous areas.
Thank you again for the thoughtful feedback, and please come back once the jam is over to check out the next version!