Yay I'm quite happy you liked it! :)
Yeah some people didn't really like restarting over too much and asked for an endless mode, but I think it's nice. I don't know, I might offer two different modes eventually, and maybe add something you can keep between levels? Not sure. I personally like the feeling of starting over and thinking "I'll optimize it a bit better this time" lol
Ah that's good feedback! Yeah the invisible monsters are 100% on purpose but I didn't think about the fact that they don't have a death animation so it's unclear when they die. Thanks!
Thanks for playing ^_^ cheers