Takes long to load and doesn't seem to detect the dinosaur.

When I run node index, it takes a long time to load and it doesn't seem to detect the dinosaur. It also shows "Playing" status all the time. Using windows 10 and latest chrome.

I think it has to do with the offsets being different.

EDIT: Had to do robot.js mouse position was wrong in HD displays.

Current issue: robot.js seems much slower on windows than on other platforms. This messes up the learning ability.

Start by running `node index` on Windows 10 and inspect `robot.js`, focusing on the reported slowdown compared with other platforms. Reproduce the effect on the dinosaur detection and learning behavior, then verify that the run no longer stays in Playing status and performs comparably across platforms.

Written by the indexing model from the issue text.