Found this solution while searching for a PowerPoint alternative that let you use iframes while presenting. Enter Ludus. The smart blocks are innovative, the software is snappy, and with the iframe support, it's exactly what we needed to shine when demonstrating our web app to investors and clients.
The only bug I've noticed is after updating a draft presentation, the present mode doesn't recognize the draft has been published right away. This doesn't cause technical glitches but the "draft" status message is a little distracting.
Overall, I'm really glad I found this solution. You guys are a step ahead. Keep it up!!