Agreed, ccuracy of skill isn't really important since you're trying to show your ability to learn, adapt and solve problems. Language isn't as important as a good engineer and/or entrepreneur (I'd except YC are very language agnostic). As suggested elsewhere, maybe list the language and then some very brief descriptions of projects.

Thanks for the feedback.

Perhaps an accordion would serve to condense the information into a more manageable space... or maybe displaying them in a different chart style. I'll have to put some thought into it.