Downloading IPA files from unofficial sources is inherently risky. These files can be easily modified to include malware, spyware, or other malicious code that could compromise your personal data. Only download from sources you trust completely, and always be wary of any file that promises "unlimited keys" or "cracked" features, as these are almost certainly fakes or dangerous hacks.
Be aware that version 1.0 may not run on newer versions of iOS (specifically iOS 11 and later) because older apps were built on 32-bit architecture, which modern Apple devices no longer support. Fun Facts About Early Subway Surfers