Very fun. I do feel you need to get into the volumes more extensively.- the drawings are a little superficial. Try breaking it down into objective forms. And build from the inside out. Not literally just from a foundational thought process. You got the details but there is no form design or structure to latch on to

Loose and rough- great- lets see more drawing from the inside out at this stage. I see a lack of understanding of the internal structure. Think of the arm in its skeleton form not its flesh silhouette . So more wire armature rhythms and then build volumes and details on top of that. Great energy though

Hi...well nice and loose. But you either ran out of time or lost interest. Either is fine but suffer a little bit and you will grow and benefit from this exercise. Finish these off- explore, discover, endure the pain of growth. You have a great loose lively style- I would love to see you finish these to completion.

GREAT loose sketches. lets try and flow those muscles together now that you understand them in their own compartments. Also when drawing out of your head try to use this muscle approach in more true poses... some look like they are standing straight up. ITs rare to see them fully standing. The model is more for teaching resource

Proportionally correct, proper structure. I the next thing to do is, while drawing, to imagine this ape to be a character of its own, envision him as part of a story - I guess the drawings will then come more alive to the viewer.