I like the general art direction, I have about twice the amount of art of what's shown in the game already done, I have the narrative and I have almost all mechanics (unless I decide to implement fights), so rationally speaking... I should do it. I would need to do some significant cleanup, but after that it should be fairly straight-forward content creation.
(SPOILERS AHEAD) The winged creature becomes able to transform into a horned creature (which can dash instead of double jump) after the sword thingie. The core of the gameplay is about combining the two abilities (jump and dash), sometimes swapping mid-jump. The main char also has some unique power related to reversing, and it's used on other contraptions, small puzzles that combine with the platforming and so on. About the world and the power of the char, more becomes revealed slowly through a few NPCs that are placed in more "secret" or hard to reach locations, which are not essential to beat the game, but act as secondary rewards for more thorough exploration. And you keep finding a few more of those big swords... and then... well, I'm not going to spoil the end of the game here.