That deck seems to have Panic Spellbomb and Trigon of Rage as "creatures" and Chrome Steed and Darksteel Sentinel as "other spells". Also Rusted Relic and Glint Hawk Idol have the same problem although they can at least become creatures.
EDIT: Question on your Round 3, can he really do that? After combat damage has happened and creatures have died, can he still make you sacrifice "an attacking creature" like that? If this is true I will definitely have to remember this for this weekend..