Really glad you enjoyed the presentation of the game! You can't actually lose the game, you just need to survive 60 seconds. If you die, the game respawns you at Night (where there are no enemies!). I think it might be impossible to beat the game without buying any upgrades. In my rush to submit the game I forgot to tell players to interact with the beanstalk by pressing "E", which is what starts the next wave >.<
Thanks for playing, though! :)