You know, you people griping about the people who found meaning in this, need to go away. I didn't find any real meaning, and i think it's sort of weird to be sad at this sort of lack of much of anything besides whatever you yourself want to get out of it, but stop being mean, unimaginative, offensive pricks. If you don't like the game, stop trying to ruin other people's enjoyment and go play one that you do enjoy. It tells you straight up in the description that you may not consider it a game, so you could have avoided wasting your time right from the get-go. tl;dr, stop picking on your sibling or i'll turn this car around right now.
Either contain the cursor within the game, or change the controls, I actually ended up clicking on (and subsequently opening) a different game while trying to drop junk on an enemy.
I find it unfortunate, but ch0 isn't as fun as the other. The difficulty has been scaled up a bit much, the lack of trenches allow blue gems to be more helpful, but as single-target shots never were great and won't be (unless dual-red would AoE-slow).
I understand the difficulty rise, as the first was nigh cakewalk after hitting lv 40 and getting to start with kickbutt gems right off, but it seems this was an over-nerf. Lots of good ideas, just implemented a bit too harshly. After the first 4-5 stages, the difficulty took a rather large jump from "Well this is new and a bit harder to get used to" to "Why is everything i just learned in the last stage completely useless?". I love TD games, but I just can't find this one fun, as it's more of a chore to complete levels. I like the ideas (traps, shrines, multiple monster spawns), it just feels like the difficulty is too increased from where it was in the original too quickly.
nb4: "you just suck, quit griping and get better.".
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 "Magnetic Defense"){kind=icon}
 "GemCraft chapter 0"){kind=icon}