Cool !
In the next version why not bringing difficulty in next levels ?
Some simple ideas :
- Ennemies (why not 3D retpr style) !
- A sword gaining power by collecting gems
- Shield (collectable fragments to increase it)
- Bonus Goal like collect all special gems to have a bonus
at the end : more Xp or components to upgrade shield or life.
- Keys like in Doom also ?

So you would have the main goal that is exit the level !
And side quest goals like upgrading the sword and shield !

It could turn FPS why not : Armor and Gun !


Just ideas !
Keep it up !