Ala, this is looking really great! It’s clear that you’re putting what was in the lessons into practice, so I have no doubt you’ll kill it at the next level of animation courses.
I would like to know how to make the object “stretch” (get bigger/smaller) Knowing that it’s gonna be used later in the unity game engine, so assume modifiers won’t be a solution here isn’t ?
It looks like you might have to redo your rig a bit for that, because you’ll need a way to control the top bone’s location so that you can make it lag behind a bit, but it’s definitely doable. Bendy bones might help here.
And finally, can I split an animation into multiple parts?
Yep! That’s exactly the right idea, and Unity will even be able to blend between them so that it’s not a harsh cut.
Also, can i “disable” an animation keyframe without removing it ?
Not a single keyframe by itself, but in the curve editor or dope sheet you can “mute” a channel (like the X location) with the speaker icon so that it doesn’t contribute to the end result.
Keep up the good work!