I'd honestly be more concerned about how funny the Mexican looks. Spicy food is definitely something eaten a lot in Mexico. If you made a game about running across the border or taking siestas to earn points then it might be an issue. But chasing chilies shouldn't be an issue. Just avoid any negative stereotypes in character design and gameplay and you should be fine. But if its a concern still then contact your state board on human rights. They can direct you towards creating games that promote different cultures in a positive light. You would have the side benefit of being able to advertise approved by state of <state> department of human rights.