I tested the opening flow, launched the ranked circuit, started the 100m event, and explored the Locker Room and desktop windows. The early-2000s desktop presentation is immediately charming and more than a skin: opening apps, overlapping windows, athlete customization, flags, and the global score target all support the fantasy. The Locker Room is especially well structured — controls have clear labels and the preview updates the feeling of ownership before the first event.
The largest usability issue is putting a mouse-wheel-only event first. The page says mouse, trackpad, keyboard, or touch are supported, but the 100m prompt only offers scrolling. A keyboard-only player reaches the ranked circuit and is blocked immediately. Please add an alternate input such as alternating A/D or Left/Right keys (and show it beside the scroll prompt). That would also make the game easier to test and more accessible.
A smaller UX issue: several app windows can remain open at once, so it is easy for a new player to lose which window is active. Stronger active-window contrast or a small first-use hint about minimizing/closing would help. Overall, the presentation is memorable and the five-event/leaderboard structure gives it a clear replay goal; input parity is the main thing I would fix first.