You scored a better position with another company. Naturally, the day after you leave you'll be blamed for any/all things related to your projects. So, to cover yourself (and possibly garner a few chuckles), here's a disclaimer form to be distributed to any developer(s) who take over your project:
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I, ___________________________, hereby acknowledge that any inefficiencies, imperfections, redundancies, spaghetti code, and/or band-aid solutions contained within [project name]-related code is the direct result of time constraints, minimal training, conflicting business logic, unstable requirements, and other such unforeseen events.

I hereby absolve [your name] of all liability with respect to physical and/or mental afflictions resulting from development and maintenance of [project name] code, including (but not limited to) stress, migraines, palpable frustration, constipation, and all other afflictions of comparable severity.

Signed,

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SIGNATURE

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