I continued playing this again a few days ago having “paused” almost exactly a year ago. I think I’d struggled on a level and lost interest, but it is actually a very good tower defence game. I resumed it part way through Autumn (the game is split into four chapters, one for each season), and quickly progressed to Winter, where I ran into difficulty.
It’s just so damn hard. In the final season, you have to deal with your weapons freezing, and although you get an item to help negate this later on, it’s not cheap and uses up precious space on the map. Eventually though, I made it to the end boss who was surprisingly simple – or not surprisingly, considering a power-up you’re given right at the end.
I can definitely recommend Beware Planet Earth, especially if you like this sort of game. And it has a toilet in it, so what more can you want?