Well, I was unable to clear stage 1 of week 4, even with exploits. I suppose I'll be giving my feedback now.
First off, it's always impressive to do a lot within one week with such a lean crew of one person. This isn't your first foray doing it and I imagine time constraints got to you this time more than some of your previous times. I do not know what it was like behind the scenes and can not imagine. That said, I can only comment on what's present, moving onto the feedback..
So, I'll admit, your concept definitely caught my eye but I suspect the game lacked some time it deserved. I ran into... more than a few bugs, from simple ones like the UI doesnt scale with my screen size, so when I full screen it everything gets fucked up and I can see menus I shouldnt be able to covering parts of my screen and that I can only open and close the pause menu once during gameplay. These do not prevent me from completing the game and did not hinder my experience. What did was that I found that a lot of the jumps in the game just... required a lot more than expected. If my dash clips a wall at 1 degree, I lose all my momentum, some blocks (on progression path) that look like they should be able to be jump-able or jump into dive-able were not. I do not know if this was a framerate locked to game logic bug or merely lacking time to test, but my fps is always locked to 60 anyway so Im unsure. This made what should be basic jumps much much harder. What also did not help is I would always respawn at the start if I fell. I'd suggest perhaps keeping track of last stable ground reisen is on so she can respawn there if she falls, helping some traversal at greater heights and reducing frustration from the already demanding jumps. I'm actually not sure if some of those later levels are even completable legit as I stopped being able to make some jumps as intended and had to start jumping up slopes in week 3 that were not supposed to be traversed like that and using the bug where jumping at a wall after hitting that wall resets your dash. These techniques helped me make it all the way to week 4 stage 1. There's a section there in stage 1 by the second futon where you have to jump up one block and then a second before doing a wrap around thing. Both of these jumps could not be done for me with a jump nor a jump into dash at peak jump with distance to ensure maximal height from the dash. I had to use the infinite dash exploit to dash between two walls hoping for necessary height. the first, an angle of 180 degrees, the second a rougher 90 degrees. Despite this successful climb I could not find a way to traverse around the bend safely. I was already making extensive progress relying on glitches to succeed and ran out of tricks. I can not imagine the execution requirements on keyboard. It is unfortunate that my run went like it did.
However, things are not all doom and gloom, as I had said, I love your concept and find both the 3d models themself cute (reisen is lovely) as well as finding how you framed each week's stage select on the main menu just... mmm... GOOD SHIT. lovely menu design. I wish I could of played a more polished version of this idea.
UPDATE: version 1.11 made me able to get to week 4 stage 3, but the new respawn mechanic marks ground you cant climb back up from (ei the rose table and lower section) as safe ground, making soft locks easy