Save statistics of level attempts

[vsnunes]

These changes save how many times the player completes, timeouts, or falls on a given level.

My motivation was to find out which levels were the toughest for me (the ones with the highest timeouts and falls)

It supports score files without any statistics so you don't need to restart your game progress but it will start adding them to the files as soon as you complete or fail a level. Back up your scores folder before testing this so you can easily revert.

[parasti]

This is cool.

[parasti]

I only had a quick glance, and there's one thing that sticks out to me and this is related to the file format itself: What if you wanted to track more stats in the future? What if you wanted to remove a stat in the future? You have encoded the three stats as an array of numbers, which is order-dependent and you've forever reserved indices 0, 1 and 2 for those stats. I think they should be key-value pairs instead, which would make them order-independent and more flexible.

[vsnunes]

What if you wanted to track more stats in the future? What if you wanted to remove a stat in the future?

Good point. I'll change that. Thanks.