Due to an oversight during development of The Hibernator Alpha 0.3.0 Pre-Release 3, I miscalculated the ammo required to complete 3 levels. As a result, versions 0.3.0 Pre-Release 3, 0.3.0, 0.3.1, 0.3.2, and 0.3.3 are impossible to finish in Classic Mode. This critical bug will be fixed in Alpha 0.4.0 Pre-Release 1, dropping this weekend.
Sorry for the frustration this may have caused, and thank you for your patience.