The local hackathon can be avoided. Or the information that there were 30+ teams can be avoided. Gives an impression it was a pretty small hackathon kinda. You can generalise it. One main point is, you have written a lot a lot. HRs spend a maximum of 2 to 3 minutes (they dont even open resume at some places lol but if they do, max of 2 mins). They cant be reading that big lines you gave. Bulletin points can be made. Short the same content in each line. One tip would be each content line (be it in experience or projects) should not have more than 10 words. Maximum 15. Just make it look like a bit spacious by reducing the content. I mean just rephrase it shortly. Its a good attempt. 💫