Merge pull request #194 from HeavenManySugar/MemoryLeak

Fix window icon memory leak and add error handling

Merge pull request #191 from NOOBDY/aa

added anti-aliasing support and some documentation

Merge pull request #182 from ntut-rick/delta

Fix Delta time & Delay

Merge pull request #178 from NOOBDY/export

export variables

The first release for oopl2024s students