Thank you very much for your feedback!
Especially for letting us know which level it was that made you give up, and what it was that specifically killed you, that's invaluable info. I do agree though, that level is just barely too long/unforgiving enough that failing near the end made me want to give up as well.
We'll make sure to add some coyote time when we continue development and polish the platforming mechanics, hopefully that and a few other adjustments will make the gamefeel a bit better. Probably tune the levels a bit as well to make them tighter, or a checkpoint system, something to make failure less frustrating.
My sister put a lot of work into the art, she'll be happy to hear you liked it. If you'd like, you can skip ahead with the level select to the final level, which honestly I also think is a bit too unforgiving, but it was too late to change it before uploading. There's some more nice art at the end as a reward. :p
Thanks again for your feedback!