There may be more power-ups in the future, yes! Although they'll likely come after the V8 update.
We're glad to hear you like SMBR as well! They're made by a different team that is partnered with us, and we're open to accepting more games as well.
Not sure yet if we'll get any more 'in-house' games (SMC & YFS are made by us directly), since we're quite occupied with those already! Currently our internal development has a large focus on SMC.