Where did you get your information for this? Some of the solutions presented here seem like they would be disastrous for the environment on their own. Megadams cause huge environmental disruption and the ocean thermal plants as they're described here sound like they would increase the temperature of the ocean floor and potentially damage that ecosystem further.
We cannot rely only on imaginary future technology like large scale reflective aerosols (which may have their own environmental consequences) or fusion to solve climate change, and I think it's unlikely that we can stay below 2.0 C without affecting production. The Eco-Knowledge Quiz acknowledges this with its question about fast fashion. Each solution presented in the game comes with trade-offs in the real world, but none other than price are acknowledged in-game.
One game that does this pretty well is play.half.earth, which tracks how different climate solutions are rooted in ideologies, and includes a variable for Ecosystem health to better consider the damage we're doing to the world other than carbon production. Another good one in this genre is Green New Deal Simulator, which is less well researched, but manages to punch above its weight by recognizing a wide variety of infrastructure projects which may be effective and the need to balance and plan them together.
I think you have a good base for a game here, but I think it needs further research (and maybe a keyboard press to pause it)