My new cactus garden

I don't know how this happened but I have killed two cacti gardens in a pot.  My sole cacti in pots are doing fine.  I'm not sure why this didn't make it but it could be a victim of overwatering as the cactus was all soft and mushy. Here'is what it looked like before I threw it out.  The leaves won't stand up. 

i didn't mourn this loss for long...my parents got me a new cactus garden which I think is sooo adorable...
I'm hoping this one stays around for a long time.  I got a spray bottle so i could spritz it every four days instead of drenching it under the faucet.  I've been taking care of it for 2 weeks now and so far so good...