It depends. Since you mentioned married filing jointly both yours and your spouse's incomes together are considered when determining filing requirements. If you meet the tax filing requirements your income would include any income even if only $1 unless the income is specifically excluded by IRS rules. Game playing and/or hobby income is taxable income thus not excludable.
Generally you are required to file if your income exceeds the standard deduction for your filing status. For married filing jointly for tax year 2024 that is $29,200. For married filing separately, however, the threshold is $5.
Assuming you and your spouse together (or separately) meet the filing requirement you would include your hobby income in the "Miscellaneous income" topic using the "Hobby Income" item.
The $600 number you mention is the threshold for payers to report payments to non-employees on a form 1099-NEC or rent payments or prize/award payments, etc on a form 1099-Misc. Whether you receive one of these forms or not is not a determining factor for filing the income on your returns.
For more detailed information see Table 1, IRS Publication 501 here.
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