It's alright. Being "endless" is a major detractor though. The game seemingly runs out of content after like 10 levels or so. I got up to 50 and after they added a 2nd base blasting you from the rear I saw nothing else new

No new upgrades were adding. No new strategies. No new unit types... Just the enemies having far higher stats . They getting like level 30 aoe size while you're stuck at 10 lol.

Was fun for 10 minutes but I prefer games more carefully crafted/interesting than those that scale infinitely with no artistic touch to them

Yeah it's a demo and more content will probably be added but I'd have a hand made selection for 50-100 levels before the endless procedural generation kicks in personally