Wow, this is so much feedback...! But don't worry, it's very much appreciated!
Please, don't feel like you need to beat the boss to rate the game if you don't want to. The boss is the end of the game, and there is only a cutscene afterwards. And also because, yes, he is very hard! Though probably harder than we intended to make it. If you feel up to it, check back in after the Game Jam has ended, we have plans to fix some of the issues with the boss, as well as the other issues that you ran into on your run. You can wait until then!
Don't worry about the negativity, we know you don't hate the game! In fact, we saw some of these complaints coming as we tested the game further after the jam. Some of them were due to a lack of time for enough testing, and some were design choices, like the I-frames (though as more people play the game, we've seen that it probably wasn't the best implementation of the idea). The boss pitfall respawn thing is something we just... somehow didn't pay attention to...
Controller support was an idea, but we wanted to get a playable version uploaded before we focused on it, and ran out of time. But that will be coming in the updated version, as well as fullscreen. We're also going to try and get the camera perfect once and for all... believe me we know all about the frustrations with it, it took us forever to get it to where it is now and it STILL breaks sometimes.
With platforming and dashing, we're definitely going to add the coyote time too. We put it in the jumping but didn't really think to add it to wall climbing. Hopefully, this will make the climbing more consistent, and keep you from falling, or from jumping straight up in a line (which sometimes happens right now)
We did intend the game to be hard though, and I think that we succeeded in doing that, but we failed in giving the player the right tools to overcome it. If you do have suggestions on how to make it more hard, but keeping it in a fun way, feel free to give them here!
And we definitely plan for it to be a longer metroidvania! We came up with a lot of plans for things that didn't make it into the final game, which probably took away from some of our time for testing... but it gave us motivation to finish, and to continue! Hopefully, you and everyone else will get to see those plans made into reality.