Doesn't work here. Have tried setting permissions in a number of places and following along with the postinst in the deb. Here's the syslog for when it crashes, if that helps.
May 8 12:54:41 iPhone kernel[0] <Notice>: xpcproxy[1351] Container: /private/var/mobile/Containers/Data/Application/323C10CA... (sandbox)
May 8 12:54:41 iPhone com.apple.xpc.launchd[1] (UIKitApplication:com.tinycorp.avengers[0xe1c1][1351]) <Notice>: Service exited due to signal: Trace/BPT trap: 5
May 8 12:54:41 iPhone assertiond[120] <Warning>: Unable to obtain a task name port right for pid 1351: (os/kern) failure (5)
May 8 12:54:41 iPhone SpringBoard[1165] <Warning>: Unable to register for exec notifications: No such process
May 8 12:54:41 iPhone SpringBoard[1165] <Warning>: Unable to obtain a task name port right for pid 1351: (os/kern) failure (5)
May 8 12:54:41 iPhone SpringBoard[1165] <Warning>: Unable to obtain a task name port right for <FBApplicationProcess: 0x13b3ab400; com.tinycorp.avengers; pid: 1351>
May 8 12:54:41 iPhone SpringBoard[1165] <Warning>: Application 'UIKitApplication:com.tinycorp.avengers[0xe1c1]' crashed.
May 8 12:54:41 iPhone ReportCrash[1353] <Notice>: MS:Notice: Injecting: (null) [ReportCrash] (1240.10)
May 8 12:54:41 iPhone ReportCrash[1353] <Notice>: MS:Notice: Loading: /Library/MobileSubstrate/DynamicLibraries/RocketBootstrap.dylib
May 8 12:54:41 iPhone SpringBoard[1165] <Warning>: Application '(null)' exited for an unknown reason.
May 8 12:54:42 iPhone ReportCrash[1353] <Notice>: Formulating report for corpse[1351] marvel
May 8 12:54:42 iPhone lsd[220] <Warning>: LaunchServices: Unentitled vendor device identifier lookup for app com.tinycorp.avengers by pid 1353
May 8 12:54:42 iPhone ReportCrash[1353] <Warning>: report not saved because the limit of 25 for 109_marvel logs has been reached.
May 8 12:54:42 iPhone ReportCrash[1353] <Error>: Notice: This report is abbreviated for syslog inclusion because it could not be savedto disk.
Symbolication may be possible by manually cleaning up and including the Binary Image section of a full report from this same device -- good luck!
May 8 12:54:42 iPhone ReportCrash[1353] <Error>: Process: marvel [1351]
Path: /private/var/mobile/Containers/Bundle/Application/DABBB743.../marvel.app/marvel
OS Version: iOS 9.0.2 (13A452)
May 8 12:54:42 iPhone ReportCrash[1353] <Error>: Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000001, 0x00000000e7ffdefe
Triggered by Thread: 0
May 8 12:54:42 iPhone ReportCrash[1353] <Error>: Dyld Error Message:
Dyld Message: Library not loaded: @rpath/Sentry.framework/Sentry
Referenced from: /var/mobile/Containers/Bundle/Application/DABBB743.../marvel.app/marvel
Reason: no suitable image found. Did find:
/private/var/mobile/Containers/Bundle/Application/DABBB743.../marvel.app/Frameworks/Sentry.framework/Sentry: mach-o, but wrong architecture
Dyld Version: 369.12