Having the 'rinos left in the world' really drives the point home that you're killing off the entire population. I think the idea for the end screen that says they're extinct is a great idea to emphasize how bad the issue is and how much poachers contribute to wiping out animal populations.

Really interesting focus on ivory hunting that I never even thought of, it would be cool if building further on this game, you could explore other types of unethical hunting as well. I agree with Sophie though, if the rhinos were more running away, that would be a better picture since this could be seen as just defending yourself from attacking animals. Otherwise super cool and limitless potential. 

I like how the rhinos drop their horns immediately where you shot them, but sometimes it's hard to get started if rhinos spawn really close to you (cause there's not enough time/space to move away from them). On that note, it does seem kinda weird that the rhinos are moving toward you since you're trying to shoot them. Overall fun game, though!