I had a discussion some time ago with some fellow GM users, and that's how we all interpreted Yoyo's new EULA. Here, take a look:
2. Software Intellectual Property Rights
2.1. You agree and acknowledge that all right, title, interest and ownership rights in any and all copyright, design right, database right, patents and any rights to inventions, know-how, trade and business names, trade secrets and trade marks (whether registered or unregistered) and any applications therefor and other intellectual property rights (?Intellectual Property Rights?), in or connected with the Software and any and all copies thereof (including in particular but not limited to any data, database, designs, titles, computer code, themes, objects, characters, character names, stories, dialogues, catch phrases, places, concepts, artwork, animation, sounds, music, audio-visual effects, text, methods of operation, moral rights and any related documentation) are owned by YoYo Games. All such rights of YoYo Games are hereby asserted and reserved.
That says nothing about any rights being reserved to any copyright holders. It's pretty firmly asserting that "any rights to inventions... designs, titles... characters, character names, stories... moral rights and any documentations are owned by YoYo Games."
It even says they own all "trade marks (whether registered or unregistered)." Is that even legal?
So, unless someone with a law degree can tell me that's misleading, they shamelessly lay claim to your hard work.
Either way, I'm glad Construct isn't like that. I'm also coming to like being able to get right into making a platformer without having to define all the platform behaviors ahead of time. Thanks for the info.