WIBTA if I refuse to hand over my new switch 2 games to my mom after I bought it with my own money

I am 14 years old and recently bought some Nintendo Switch 2 games. I paid for them completely with my own money. This money came from cash gifts from my grandma, other relatives, and Lai see, along with leftover money and spare change that I saved over a long time. The problem is that I bought them without asking my mom for permission first. When she found out, she got upset because I made this purchase without telling her. Now, she is demanding that I give the games to her.

I understand she is mad that I kept the purchase a secret, and I am willing to apologize for that. However, I don't think it's fair for her to take my games away. It wasn't her money, and I worked really hard to gather every bit of my holiday gifts and savings to buy them. I want to refuse to give them up, but I’m willing to offer to follow strict screen-time rules, like only playing after homework is done. WIBTA if I refuse to give her my Switch 2 games?