In the last few years, while trying to help users I've downloaded hundreds of capx from this forum and this is the largest yet..
After opening it, it became clear that was mostly because of the huge images and the amount thereof..
But ofcourse,why would 415.5MB estimated memory usage be too big?
Oh I haven't found the pinning issue yet, neither in the game nor in the event sheet..
Why don't you name the sprites?
Having them all called spriteXX is pretty hard to read
Also grouping similar events would make reading the event sheet a lot easier..
Maybe using families and functions, tilemap and/or tiled backgrounds?
Just some friendly advice..