B29
The game took about 20 seconds to start on Chrome - Desktop PC. It never failed at any stage.
N/a
Merging took me a second to figure out but everything else made sense - perhaps a small note like you have for recruit etc. would help
The enemy having a healer in stage 3/4 was quite frustrating but not because it was healing, more so because I was unable to target the healer instead of only attacking the slimes in the front. I actually ended up getting stuck on Level 4 because I couldn't out-damage the healing with a Level 2 Guard, 2 Level 3 Mages and a Level 2 Healer. I killed 1 slime, but with 2 remaining the healer's heals were too much.
As mentioned above I got to Stage 4 - I would definitely be interested in playing some more in the future!
I've also got a playtest up - no pressure to do so - but if you wanted to take a look it would be hugely appreciated.
Hope this helps!