ERROR in

action number 1

of Mouse Event for Left Pressed

for object upgrade_card:

Variable <unknown_object>.amount(100030, -2147483648) not set before reading it.

at gml_Object_upgrade_card_Mouse_4

############################################################################################

gml_Object_upgrade_card_Mouse_4 (line -1)

I have always like the idea of an inverse tower defense and so I have really enjoy your game. Even though the game crash sometimes, it's still funny to see the imps destroying the castle.

This is cool! I liked choosing between different upgrades and seeing what would work best.

Nice game

it's a cute and funny one, the music stops and never come back at a moment. Maybe with more strategic choice and some visual feedback on damage it would be great ! Well done

I like the idea of a single player tower wars game. I think it would be cool if the towers were rebuilt and upgraded, so both you and the enemy get stronger over time. Imps are very cute <3