Had a fun time with this one! Really nicely polished, presentation is at a high level both graphically, musically as well as level design. I struggled a bit at first selecting weaponry, before realizing what I was in for! Has clear Stanley Parable influences and fun surprises, especially liked the hidden pile of segways hidden underneath the racetrack. Lovely touch with the voiceover. The constant recurring jokes were good too, the nukes, segways etc. I had hoped to drive off a cliff on one at some point, when the first segway was shown (And if you don't know that reference, please check how the inventor of the segway passed away..)
Two things did stand out to me, the first being the theme, where in game modes it felt very logical, but after the CS mode of the shooter, we're shipped off to different games, rather than modes. Most importantly though, I think it lacks reactions to the players inputs. It nails some of the vibe and humour of Stanley Parabole, but feels very linear - I feel like my expression as a player is often not recognized. When I discovered I could simply hop over the barrier and walk around to get 5 second laps, it'd be fun if the narrator recognized such actions, acting surprised at my record or had hoped for a fun quib when I tried to stall the connect 4 game by making obviously terrible plays. Similarly I expected some dialogue with the pile of segways hidden underneath, I had that feeling of finding a secret, but with less of the reward. Some jokes also lingered a little too long, it could use with tighter pacing.
Then again, what you've accomplished in such a short time frame is already amazing, great job!