really liked this one!!, it has a pretty cool chase scene in it!, cool animations and gimmicks in it, and the fact its all make in blender is pretty cool (blender is hell to use sometimes) though this too also needs some pacing, the starting segment takes too much time out of the whole video, the second part is where all the action really is, so you still wouldnt want to drag out the introduction too much to get to the good bit faster, i would speed up things like drawing the stickman itself and and the box around him, and make stuff like the title card and the time between animations of him getting out of the box a bit shorter than what they are
for the second part after he escapes, the pacing may be a bit TOO fast, like when the mouse followed him and clicked on the yellow man logo i didnt catch that that happened so it felt like it opened out of nowhere, but when he tried asking henre for help and his dialogue went too fast i think that was okay or even good pacing, because it was a futile attempt at communication so whatever he said to him didnt really matter so you could fast forward through it, but then the chase continues after it felt a bit too fast and couldnt make out what was happening, it looked like he opened a black hole at the end but it went too fast how he even got it, so you may need to try slowing that down
i think thats all the advice i can give, hope you continue making these and make them even better!, pacing is key to decent animation, hope to see you work on that, and dont be afraid to ask for opnions and advice on it either, practice makes perfect always